Structural element
Author: l | 2025-04-24
Passive structure elements can be accessed by behavior elements. A passive structure element is a structural element that cannot perform behavior. Active structure elements can perform behavior on passive structure elements. Passive structure elements are often information or data objects, but they can also represent physical objects.
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Structural Elements and Types of Structures
PROKON Structural Analysis and Design is a suite of over forty structural analysis, design and detailing programs. The first PROKON programs were developed in 1989, and today PROKON is used worldwide in over eighty countries. The suite is modular in nature, but its true power lies in the tight integration between analysis, design and detailing programs. PROKON has been improving the lives of structural engineers everywhere for more than two decades.ProkoN 2.6.53 Free Download Full Version Download. ProkoN 2.6.53. Full Version Lifetime License Serial Product Key Activated Crack Installer.PROKON Structural Analysis and Design By Engineers, for Engineers PROKON is developed and supported by a team of professional engineers and intended for use by structural engineers and technicians. The software provides quick and reliable answers to everyday structural engineering problems: Frame and finite element analysis Steel member design Steel connection design Reinforced and prestressed concrete design CAD and reinforced concrete detailing Timber member design Masonry design Other structural applications such as section properties calculation and section database.Understanding the ELEMENTS of Structural Elements ️
Distribution of green space, buildings, and main road networks in the study area. Figure 2. Green space, buildings and main road networks in Fuzhou High tech Zone. Notes: The figure shows the distribution of green space, buildings, and main road networks in the study area. Figure 3. Research framework for the relationship between urban green space pattern and noise based on MSPA. Figure 3. Research framework for the relationship between urban green space pattern and noise based on MSPA. Figure 4. Current status of noise distribution in Fuzhou high-tech zone (Unit: dB). Figure 4. Current status of noise distribution in Fuzhou high-tech zone (Unit: dB). Figure 5. Noise reduction amount in Fuzhou high-tech zone (Unit: dB). Figure 5. Noise reduction amount in Fuzhou high-tech zone (Unit: dB). Figure 6. Results of structural characteristics of green space distribution in Fuzhou high-tech zone. Notes: The picture shows the distribution of green space elements after MSPA analysis. Figure 6. Results of structural characteristics of green space distribution in Fuzhou high-tech zone. Notes: The picture shows the distribution of green space elements after MSPA analysis. Figure 7. Statistics on the results of the green space distribution characteristics of the Fuzhou high-tech zone. Figure 7. Statistics on the results of the green space distribution characteristics of the Fuzhou high-tech zone. Figure 8. (A) Geographically weighted regression coefficient of Branch (left) area proportion, (middle) element area geographically weighted regression coefficient, (right) element perimeter geographically weighted regression coefficient. (B) Geographically weighted regression coefficient of bridge (left) area proportion, (middle) element area, (right) element perimeter. (C) Geographically weighted regression coefficient of core (left) area proportion, (middle) element area, (right) element perimeter. (D) Geographically weighted regression coefficient of edge (left) area proportion, (middle) element area geographically weighted regression coefficient, (right) element perimeter geographically weighted regression coefficient. (E) Geographically weighted regression coefficient of islet (left) area proportion, (middle) element area geographically weighted regression coefficient, (right) element perimeter geographically weighted regression coefficient. (F) Geographically weighted regression coefficient of loop (left) area proportion, (middle) element area, (right) element perimeter. (G) Geographically weighted regression coefficient of perforation (left) area proportion, (middle) element area, (right) element perimeter. Notes: The figure shows the spatial distribution of the regression coefficients after GWR analysis. Figure 8. (A) Geographically weighted regression coefficient of Branch (left) area proportion, (middle) element area geographically weighted regression coefficient, (right) element perimeter geographically weighted regression coefficient. (B) Geographically weighted regression coefficient of bridge (left) area proportion, (middle) element area, (right) element perimeter. (C) Geographically weighted regression coefficient of core (left) area proportion, (middle) element area, (right) element perimeter. (D) Geographically weighted regression coefficient of edge (left) area proportion, (middle) element area geographically weighted regression coefficient, (right) element perimeter geographically weighted regression coefficient. (E). Passive structure elements can be accessed by behavior elements. A passive structure element is a structural element that cannot perform behavior. Active structure elements can perform behavior on passive structure elements. Passive structure elements are often information or data objects, but they can also represent physical objects. AstroGrav Help /Data Elements /Structure ElementsVersion 5.3. Structure Elements. An object's structure elements are the properties of the object relative to its parent. The structure elementsStructural and Connecting Elements of Wooden Structures
Molecule Chemical structure Chemical compound Chemical formula Chemical substance, angle, white png --> PNG keywords angle, white, text, logo, gold, chemistry, black, acid, number, structure, parallel, topology, molecular Formula, molecule, structural Formula, symbol, threshold, line, isopropyl Alcohol, irreversible, area, arsenic, brand, chemical Compound, chemical Formula, chemical Property, chemical Structure, chemical Substance, circle, diagram, empirical Formula, iii, 1propanol, png, sticker png, free download , DMCA Contact Us --> Download PNG For Free ( 14.04KB ) atOptions = { 'key' : '47465c85bf2fbc68bfa26906d335f5d5', 'format' : 'iframe', 'height' : 90, 'width' : 728, 'params' : {} }; document.write(''); --> PNG info Dimensions 1002x768px Filesize 14.04KB MIME type Image/png resize png width(px) height(px) Non-commercial use, DMCA Contact Us Chemical compound Chemical synthesis Chemistry Organic compound Molecule, chemical formula, angle, white png Organic chemistry Oxytocin Molecule Chemical formula, Oxytocin, angle, white png Ethanol Structural formula Chemical structure Alcohol, angle, white png black and white ball illustration, Molecule Chemistry Molecular geometry Chemical structure, molecule, blue, text png Caffeinated drink Coffee Caffeine Chemical structure Molecule, Coffee, angle, white png Creatine Chemical structure Molecule Creatinine Chemistry, Purpose Use, angle, text png Tetrahydrocannabinol Molecule Cannabidiol Cannabinoid Chemical structure, cannabis, angle, white png Chemical substance Molecule Chemical structure Chemical compound Chemistry, paracetamol, angle, white png Benzene Chemistry Chemical structure Structural formula, rubbers, angle, white png Glucose Chemistry Organic compound Chemical compound Fructose, molecular structure background, angle, white png Chemical substance Chemical structure Molecule Organic chemistry, biological medicine catalogue, angle, white png background material the chemical structure, black and blue honeycomb, texture, png Material png Molecule Molecular geometry Chemistry Hexagon, common sense, chemical Element, angle png Chemical substance Hydroquinone Chemical structure Chemistry Chemical compound, Benzenediol, angle, white png Adrenaline Chemical compound Chemical structure Molecule Structural formula, Structure, angle, white png Coffee Caffeine Molecule Chemical structure Molecular geometry, Coffee, angle, white png 1-Propanol Molecule Structural formula Chemical structure Chemical bond, grab structure, angle, white png Caffeinated drink Coffee Caffeine Molecule Chemical structure, Coffee, angle, text png Nicotine Nicotinic acetylcholine receptor Chemical structure Chemical substance Nicotinic agonist, thumbtack, angle, white png six-sided shape, Cyclohexane conformation Structural formula Chemical substance Molecule, hexagon, angle, white png Molecule Insecticide Omethoate Chemical element Chemical compound, Molecules, logo, gold png Acetone Chemical compound Chemical formula Structural formula Dimethyl sulfoxide, angle, text png Ethanol Structural formula Skeletal formula Alcohol Structure, angle, white png Lewis structure Methanol Structural formula Chemical formula, angle, text png Noscapine Molecule Chemical compound Chemical formula Chemistry, Structure, angle, white png Endorphins beta-Endorphin Chemistry Peptide Chemical substance, Renin, angle, white png Euclidean Molecule Hexagon, And hexagonal molecular structure, green, blue, and white diagram, angle, text png Ethanol Chemical formula Alcohol Chemistry Chemical substance, angle, white png Ethanol Alcohol Chemical compound Structural formula Chemistry, Dissolve, angle, white png Lewis structure Pentane Molecule Chemical formula Structural formula, Lpg, angle, text png Chloroform Structural formula Molecule Tetrahedral molecular geometry Chloromethane, Chemical Polarity, angle, text png Ethane Structural formula Chemical formula Chemical compound Molecule, resting, angle, text png Molecule Chemistry Carbohydrate Biology Science, science, angle, white png Hydrogen text, Hydrogen ChemicalStructural Engineering: Elements of Every Structure
The Abaqus Unified FEA product suite offers powerful and complete solutions for both routine and sophisticated engineering problems covering a vast spectrum of industrial applications. FLAC, Fast Lagrangian Analysis of Continua, is 2D numerical modeling software for advanced geotechnical analysis of soil, rock, groundwater, and ground support. It utilizes an explicit finite difference formulation. PLAXIS 2D and 3D are powerful and user friendly finite element package intended for two-dimensional and three-dimensional analyses of deformation and stability in geotechnical engineering and rock mechanics. FLAC 3D, Fast Lagrangian Analysis of Continua in 3D, is numerical modeling software for advanced geotechnical analysis of soil, rock, groundwater, and ground support. It utilizes an explicit finite difference formulation. DIANA (DIsplacement ANAlyzer) is an extensive multi-purpose finite element software package that is dedicated, but not exclusive, to a wide range of problems arising in Civil engineering including structural, geotechnical, tunnelling, earthquake disciplines and oil & gas engineering. Tochnog Professional is a free Finite Element program offering a wide variety of geotechnical and mechanical options; modern material laws including the most recent rate independent and viscous hypoplasticity models. This program, based on the finite element method, can model and analyze a wide range of geotechnical problems, including terrain settlement, sheet pile/diaphragm walls, slope stability, excavation analysis. SIGMA/W is a powerful finite element software product for modeling stress and deformation in earth and structural materials. SIGMA/W analyses may range from simple linear elastic simulations to soil-structure interaction problems with nonlinear material models. GTS NX is finite element analysisStructural Elements and Types of Structures - quizgecko.com
Original Article Open access Published: 26 November 2024 Journal of Wood Science volume 70, Article number: 54 (2024) Cite this article AbstractDou-gong is important component of ancient timber buildings in China, Japan, and South Korea, etc. It has important decoration and load transferring functions. Due to its complex structure, Dou-gong is difficult to be fully analyzed in large-scale structured. Therefore, it is necessary to establish a reliable and simplified Dou-gong calculation model. In this study, some traditional Chinese timber buildings built in the Song and Yuan dynasties (960–1368 AD) are investigated, and the characteristics of the typical Dou-gong model are obtained. Experimental study and refined finite-element analysis of the typical Dou-gong model is then carried out to study the load transferring mechanism under horizontal load. Then, the load path is extracted from the force-flow perspective to establish a simplified beam element model. The simplified model is then numerically and experimentally verified. The results show that the simplified model has a good consistency with the experimental model, and it is suitable for large-scale structural analysis of ancient timber buildings. IntroductionDou-gong (Fig. 1) plays an important role in the overall structure of ancient timber buildings in China, Japan, and South Korea. It has a great decoration function, but also transfers the roof and horizontal loads [1]. However, Dou-gong has a special form and complex structural composition. Its mechanical properties are very different from the mechanical properties of a timber column, a timber beam, and a beam–column joint. Therefore, obtaining mechanical properties of Dou-gong is important for evaluating the structural performance of ancient timber buildings. In recent years, some scholars have used experimental research to determine typical failure modes of Dou-gong [2, 3], and studied its energy dissipation characteristics [4,5,6,7], joint stiffness [8, 9] and other characteristics. On the other hand, some scholars have studied the mechanical properties of Dou-gong through theoretical derivation and refined finite-element model analysis. According to the coordination of rocking and racking deformation and the existing method on backbone characterization of traditional timber elements, Wu et al. [10] established an analytical model on the lateral load–displacement relationship of Dou-gong joints. Based on the three-dimensional elastic–plastic damage constitutive model of wood, Wang et al. [11] carried out the finite-element model analysis on hysteretic behavior of Dou-gong. Due to the complex structure of Dou-gong, the calculation speed of the refined finite-element model analysis of Dou-gong is very slow, which is not suitable for large-scaled structural analysis. Therefore, some scholars [12,13,14,15] have tried to find a simplified method. Most of them used spring elements to simulate the semi-rigid characteristics of Dou-gong, but this method ignored the specific geometric structure of Dou-gong. Li et al. [16] used Euler beam to simulate the horizontal component of Dou-gong, and used multiple elastic links and multiple plastic links to simulate the vertical component. Although the geometric characteristics of Dou-gong were taken into account, the model was not optimized, making the simplified model too complex.Fig. 1Dou-gong layer in the main hall of the Tian-ning templeFull size imageAsWhat is a structural element?
NX, formerly known as 'UG'. In 2000 Unigraphics purchased SDRC I-DEAS and began an effort to integrate the best of both software packages into a single product when became Unigraphics NX or usually just NX, is an advanced high-end CAD/CAM/CAE, since 2007 owned by by Siemens PLM Software.Siemens NX Nastran 12 Free Download Latest Version for Windows. It is full offline installer standalone setup of Siemens NX Nastran 12 Free Download for 64.Siemens NX Nastran 12 OverviewSiemens NX Nastran 12 is a handy finite element solver for buckling, stress, vibration, heat transfer, acoustics, aeroelasticity and structural failure analyses. Engineering suppliers as well as manufacturers in electronics, medical device, mechanical, automotive and aerospace industries relies on NX Nastran software for critical engineering computing requirements.You can also download STAAD Pro v8i.Siemens NX Nastran 12 can be used as a standalone application or as an integrated in Simcenter 3D Solutions. This application solves most of te structural analysis problems for linear as well as non-linear analysis, acoustics, dynamics, aeroelasticity, rotor dynamics and optimization. Finite Element Analysis models have grown consistently in size as well as fidelity as the engineers continue to leverage increasing hardware computing capacity for tackling some of the complicated problems. You can easily create the NX Nastran models by using the Simcenter’s preprocessor. This application can also be used for solving a variety of advanced applications like NVH problems in different industries like automotive and aerospace etc. You can also download HFSS Software.Features of Siemens NX Nastran 12Below are some noticeable features which you’ll experience after Siemens NX Nastran 12 free download.Handy finite element solver for buckling, stress, vibration, heat transfer, acoustics, aeroelasticity and structural failure analyses.Can be used as a standalone application or as an integrated in Simcenter 3D Solutions.Solves most of te structural analysis problems for linear as well as non-linear analysis, acoustics, dynamics, aeroelasticity, rotor dynamics and optimization.Can be used for solving a variety of advanced applications like NVH problems in different industries like automotive and aerospace etc.Siemens NX Nastran 12 Technical Setup DetailsSoftware Full Name: Siemens NX Nastran 12Setup File Name: Siemens_NX_Nastran_2.0_Windows.zipFull Setup Size: 992 MBSetup. Passive structure elements can be accessed by behavior elements. A passive structure element is a structural element that cannot perform behavior. Active structure elements can perform behavior on passive structure elements. Passive structure elements are often information or data objects, but they can also represent physical objects.
Structural elements and their arrangements
And noise reduction. Table 2. Correlation between green space structural characteristics indicators and noise reduction. Average noise reduction in each green space structureProportion of Branch element areaBranch Element AreaBranch Element Perimeter−0.0050.0780.065Proportion of Bridge element areaBridge Element AreaBridge Element Perimeter−0.0390.0780.079Proportion of Core Element AreaCore Element AreaCore Element Perimeter−0.0190.0980.149 *Proportion of Edge Element AreaEdge Element AreaEdge Element Perimeter0.0410.167 *0.181 **Proportion of Islet Element AreaIslet Element AreaIslet Element Perimeter0.137 *0.139 *0.114Proportion of Loop Element AreaLoop Element AreaLoop Element Perimeter−0.208 *−0.0530.219 *Proportion of Perforation Element AreaPerforation Element AreaPerforation Element Perimeter−0.322−0.3010.017 Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content. © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (Structural Elements for Architects and
Structural Bridge Design offers a set of capabilities for the analysis and design of bridge structures using line beam, grillage, frame analysis and finite element techniques, all integrated into one product. Why use Structural Bridge Design? Integrated analysis and design Speed up loading, analysis and code compliance checking. Design automation Automate repetitive design, analysis and code checking tasks. Structural analysis Generate more accurate calculations for design sections and beams. What you can do with Structural Bridge Design Design and analyse small- to medium-span bridges Work with an integrated environment to automate the optimisation of traffic loading, analysis and code compliance checking for Eurocodes, British standards, DMRB and more. “With Autodesk BIM we can produce more accurate projects from the beginning, minimise revisions and save 20% in project design time.” — Cihan Kayhan, R&D Coordinator, Yüksel Proje Bridge design workflows and use cases Civil 3D + InfraWorks + Revit Use parametric modelling tools to deliver high-quality bridge designs more efficiently. Connected bridge design workflow Road design, bridge design and documentations teams can connect in a singular project model. Civil 3D + InfraWorks + Structural Bridge Design Discover how to improve bridge design project workflows with seamless data flows between various tools and disciplines. Frequently asked questions (FAQs). Passive structure elements can be accessed by behavior elements. A passive structure element is a structural element that cannot perform behavior. Active structure elements can perform behavior on passive structure elements. Passive structure elements are often information or data objects, but they can also represent physical objects.Structural Elements for - engcommunity.com
Structural Bridge Design offers a set of capabilities for the analysis and design of bridge structures using line beam, grillage, frame analysis, and finite element techniques, all integrated into one product. Why use Structural Bridge Design? Integrated analysis and design Speed up loading, analysis, and code compliance checking. Design automation Automate repetitive design, analysis, and code checking tasks. Structural analysis Generate more accurate calculations for design sections and beams. What you can do with Structural Bridge Design Design and analyze small- to medium-span bridges Work with an integrated environment to automate the optimization of traffic loading, analysis, and code compliance checking for Eurocodes, British standards, AASHTO, and more. “With Autodesk BIM we can produce more accurate projects from the beginning, minimize revisions, and save 20% in project design time.” — Cihan Kayhan, R&D Coordinator, Yüksel Proje Bridge design workflows and use cases Civil 3D + InfraWorks + Revit Use parametric modeling tools to deliver high quality bridge designs more efficiently. Connected bridge design workflow Road design, bridge design, and documentations teams can connect in a singular project model. Civil 3D + InfraWorks + Structural Bridge Design Discover how to improve bridge design project workflows with seamless data flows between various tools and disciplines. Frequently asked questions (FAQs)Comments
Element Symbol Periodic table Chemical compound, element, angle, white png Chemistry Laboratory Drawing Science, doodles, angle, text png Glycogen Chemical structure Molecule Polysaccharide, angle, white png Ethanol Structural formula Alcohol Chemical structure Skeletal formula, brazil element, angle, white png Cortisol Cortisone Chemical structure Chemical compound Impurity, cortisol, angle, white png 1-Propanol Structural formula Lewis structure, h&s, angle, white png Chemical compound Molecule Chemistry Chemical substance Chemical formula, Metribuzin, angle, white png Lewis structure Ammonia Molecule Chemistry Ammonium, dot formula, angle, text png Linalool Chemical compound Chemical formula Alcohol Structure, Time work, angle, white png Ethanol Chemical structure Alcohol Molecule, Methyl Nitrate, angle, white png Serotonin Molecule Chemistry Chemical structure Melatonin, angle, white png Coffee Caffeinated drink Caffeine Chemical structure Molecule, Coffee, angle, white png 1-Propanol Lewis structure Isopropyl alcohol Propyl group, OL, angle, white png DNA Nucleotide RNA Nucleic acid structure Chemical structure, DNA-molecule, purple, angle png Serotonin Molecule Chemical structure Chemical compound Chemical substance, feijão, angle, white png Sulfuric acid Structural formula Molecule Lewis structure, sulfurous acid, sulfuric Acid, structural Formula png Opium poppy Chemical structure Chemistry Molecule Narceine, Fc Den Bosch, angle, white png
2025-04-10PROKON Structural Analysis and Design is a suite of over forty structural analysis, design and detailing programs. The first PROKON programs were developed in 1989, and today PROKON is used worldwide in over eighty countries. The suite is modular in nature, but its true power lies in the tight integration between analysis, design and detailing programs. PROKON has been improving the lives of structural engineers everywhere for more than two decades.ProkoN 2.6.53 Free Download Full Version Download. ProkoN 2.6.53. Full Version Lifetime License Serial Product Key Activated Crack Installer.PROKON Structural Analysis and Design By Engineers, for Engineers PROKON is developed and supported by a team of professional engineers and intended for use by structural engineers and technicians. The software provides quick and reliable answers to everyday structural engineering problems: Frame and finite element analysis Steel member design Steel connection design Reinforced and prestressed concrete design CAD and reinforced concrete detailing Timber member design Masonry design Other structural applications such as section properties calculation and section database.
2025-04-07Molecule Chemical structure Chemical compound Chemical formula Chemical substance, angle, white png --> PNG keywords angle, white, text, logo, gold, chemistry, black, acid, number, structure, parallel, topology, molecular Formula, molecule, structural Formula, symbol, threshold, line, isopropyl Alcohol, irreversible, area, arsenic, brand, chemical Compound, chemical Formula, chemical Property, chemical Structure, chemical Substance, circle, diagram, empirical Formula, iii, 1propanol, png, sticker png, free download , DMCA Contact Us --> Download PNG For Free ( 14.04KB ) atOptions = { 'key' : '47465c85bf2fbc68bfa26906d335f5d5', 'format' : 'iframe', 'height' : 90, 'width' : 728, 'params' : {} }; document.write(''); --> PNG info Dimensions 1002x768px Filesize 14.04KB MIME type Image/png resize png width(px) height(px) Non-commercial use, DMCA Contact Us Chemical compound Chemical synthesis Chemistry Organic compound Molecule, chemical formula, angle, white png Organic chemistry Oxytocin Molecule Chemical formula, Oxytocin, angle, white png Ethanol Structural formula Chemical structure Alcohol, angle, white png black and white ball illustration, Molecule Chemistry Molecular geometry Chemical structure, molecule, blue, text png Caffeinated drink Coffee Caffeine Chemical structure Molecule, Coffee, angle, white png Creatine Chemical structure Molecule Creatinine Chemistry, Purpose Use, angle, text png Tetrahydrocannabinol Molecule Cannabidiol Cannabinoid Chemical structure, cannabis, angle, white png Chemical substance Molecule Chemical structure Chemical compound Chemistry, paracetamol, angle, white png Benzene Chemistry Chemical structure Structural formula, rubbers, angle, white png Glucose Chemistry Organic compound Chemical compound Fructose, molecular structure background, angle, white png Chemical substance Chemical structure Molecule Organic chemistry, biological medicine catalogue, angle, white png background material the chemical structure, black and blue honeycomb, texture, png Material png Molecule Molecular geometry Chemistry Hexagon, common sense, chemical Element, angle png Chemical substance Hydroquinone Chemical structure Chemistry Chemical compound, Benzenediol, angle, white png Adrenaline Chemical compound Chemical structure Molecule Structural formula, Structure, angle, white png Coffee Caffeine Molecule Chemical structure Molecular geometry, Coffee, angle, white png 1-Propanol Molecule Structural formula Chemical structure Chemical bond, grab structure, angle, white png Caffeinated drink Coffee Caffeine Molecule Chemical structure, Coffee, angle, text png Nicotine Nicotinic acetylcholine receptor Chemical structure Chemical substance Nicotinic agonist, thumbtack, angle, white png six-sided shape, Cyclohexane conformation Structural formula Chemical substance Molecule, hexagon, angle, white png Molecule Insecticide Omethoate Chemical element Chemical compound, Molecules, logo, gold png Acetone Chemical compound Chemical formula Structural formula Dimethyl sulfoxide, angle, text png Ethanol Structural formula Skeletal formula Alcohol Structure, angle, white png Lewis structure Methanol Structural formula Chemical formula, angle, text png Noscapine Molecule Chemical compound Chemical formula Chemistry, Structure, angle, white png Endorphins beta-Endorphin Chemistry Peptide Chemical substance, Renin, angle, white png Euclidean Molecule Hexagon, And hexagonal molecular structure, green, blue, and white diagram, angle, text png Ethanol Chemical formula Alcohol Chemistry Chemical substance, angle, white png Ethanol Alcohol Chemical compound Structural formula Chemistry, Dissolve, angle, white png Lewis structure Pentane Molecule Chemical formula Structural formula, Lpg, angle, text png Chloroform Structural formula Molecule Tetrahedral molecular geometry Chloromethane, Chemical Polarity, angle, text png Ethane Structural formula Chemical formula Chemical compound Molecule, resting, angle, text png Molecule Chemistry Carbohydrate Biology Science, science, angle, white png Hydrogen text, Hydrogen Chemical
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