Cart:
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 43905.1-2024 |
Laboratory methods for sampling fumes and gases for welding and related processes - Part 1: Determination of emission rates of fumes from arc welding and collection of fumes for analysis {译} 焊接及相关工艺中烟尘和气体取样的实验室方法-第1部分：电弧焊中烟尘排放速率的测定和分析用烟尘的收集 |
China National Standards Gas analysis Gas |
 English PDF |
| GB/T 5275.1-2024 |
Gas analysis - Preparation of calibration gas mixtures by dynamic method - Part 1: General requirements {译} 气体分析-动态法制备校准用混合气体-第1部分：通用要求 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 35861-2024 |
Gas analysis - General quality requirements and metrological traceability of calibration gas mixtures {译} 气体分析-校准用混合气体的通用质量要求和计量溯源性 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 43362-2023 |
Gas Analysis Micro Thermal Conductivity Gas Chromatography {译} 气体分析 微型热导气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 43361-2023 |
Gas Analysis Validation of Hydrogen Fuel Analysis Methods for Proton Exchange Membrane Fuel Cells for Road Vehicles {译} 气体分析 道路车辆用质子交换膜燃料电池氢燃料分析方法的确认 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 43306-2023 |
Gas Analysis Sampling Guidelines {译} 气体分析 采样导则 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.6-2023 |
Gas analysis - Preparation of calibration gas mixtures by dynamic method - Part 6: Critical flow orifice {译} 气体分析 动态法制备校准用混合气体 第6部分：临界流锐孔 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.2-2022 |
Gas analysis - Preparation of calibration gas mixtures by dynamic method - Part 2: Piston pumps {译} 气体分析 动态法制备校准用混合气体 第2部分：活塞泵 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 23825-2022 |
Determination of formaldehyde emission in wood-based panels and their products-Gas analysis method {译} 人造板及其制品中甲醛释放量测定 气体分析法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 41752-2022 |
Gas Analysis Research and Treatment of Analysis Bias {译} 气体分析 分析偏倚的研究与处理 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 8423.4-2022 |
Terminology for the oil and gas industry - Part 4: Oil and gas metering and analysis {译} 石油天然气工业术语 第4部分：油气计量与分析 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 35212.3-2021 |
Analysis and evaluation methods of gas and solution and desulfurization decarbonization and sulfur recovery for natural gas treating plant—Part 3: Technical requirements and analysis evaluation methods for sulfur recovery and tail gas catalysts 天然气处理厂气体及溶液分析与脱硫、脱碳及硫磺回收分析评价方法 第3部分：硫磺回收及尾气处理催化剂技术要求及分析评价方法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 40789-2021 |
Gas analysis—Online automated measuring systems for content of carbon monoxide,carbon dioxide and oxygen—Determination of performance characteristics 气体分析 一氧化碳含量、二氧化碳含量和氧气含量在线自动测量系统 性能特征的确定 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 40870-2021 |
Gas analysis—Conversion of gas mixture composition data 气体分析 混合气体组成数据的换算 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 13610-2020 |
Analysis of natural gas composition—Gas chromatography 天然气的组成分析 气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 38677-2020 |
Gas analysis—Measurement procedure and result—Technical requirements for calibration 气体分析 测量过程及结果 校准技术要求 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 38521-2020 |
Gas analysis—Purity analysis and the treatment of purity data 气体分析 纯度分析和纯度数据的处理 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 28125.2-2020 |
Gas analysis—Determination of hazardous materials in air separation process—Part 2:Determination of mineral oil 气体分析 空分工艺中危险物质的测定 第2部分：矿物油的测定 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5832.4-2020 |
Gas analysis—Determination of moisture—Part 4: The method of quartz crystal oscillation 气体分析 微量水分的测定 第4部分：石英晶体振荡法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 38309-2019 |
Toxicity testing of fire effluents—Guidance for analysis of gases and vapours in fire effluents using FTIR gas analysis 火灾烟气流毒性组分测试 FTIR分析火灾烟气中气体组分的指南 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 38386-2019 |
Gas analysis—Determination of oxynitride in gases—The method of Cavity Ring-Down Spectroscopy 气体分析 气体中氮氧化物的测定 光腔衰荡光谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 38309-2019 |
Toxicity testing of fire effluents—Guidance for analysis of gases and vapours in fire effluents using FTIR gas analysis 火灾烟气流毒性组分测试 FTIR分析火灾烟气中气体组分的指南 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 37180-2018 |
Gas analysis—Handling of calibration gases and gas mixtures—Guidelines 气体分析-校准用纯气和混合气体的使用-指南 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 37185-2018 |
Gas analysis—Determination of indoor harmful volatile organic compounds—"SUMMA canister and silonite tube" and chromatography/mass spectrometry（GC/MS） 气体分析-室内挥发性有害有机物的测定SUMMA罐-硅烷化管采样气相色谱/质谱联用（GC/MS）法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 37186-2018 |
Gas analysis—Determination of sulfur dioxide and nitrogen oxides—Ultraviolet differential optical absorption spectroscopy 气体分析-二氧化硫和氮氧化物的测定-紫外差分吸收光谱分析法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 37182-2018 |
Gas analysis—Gas chromatograph with plasma emission detector 气体分析-等离子发射气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5274.1-2018 |
Gas analysis—Preparation of calibration gas mixtures—Part 1:Gravimetric method for class I mixtures 气体分析 校准用混合气体的制备 第1部分：称量法制备一级混合气体 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 35860-2018 |
Gas analysis—Contents of certificates for calibration gas mixtures 气体分析 校准用混合气体证书内容 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 35861-2018 |
Gas analysis—General quality assurance aspects in the use of calibration gas mixtures—Guidelines 气体分析 校准用混合气体使用过程中的一般质量保证 指南 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 36090-2018 |
Gas analysis—Guide for quality assurance of on line automatic measuring system 气体分析 在线自动测量系统质量保证指南 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 15076.13-2017 |
Methods for chemical analysis of tantalum and niobium—Part 13: Determination of nitrogen content—Inert gas fusion thermal conductivity method 钽铌化学分析方法 第13部分：氮量的测定 惰气熔融热导法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 13747.21-2017 |
Methods for chemical analysis of zirconium and zirconium alloys—Part 21：Determination of hydrogen content—Inert gas fusion-infrared absorption or thermal conductivity method 锆及锆合金化学分析方法 第21部分：氢量的测定 惰气熔融红外吸收法/热导法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 13747.22-2017 |
Methods for chemical analysis of zirconium and zirconium alloys—Part 22：Determination of oxygen and nitrogen contents—Inert gas fusion-infrared absorption and thermal conductivity method 锆及锆合金化学分析方法 第22部分：氧量和氮量的测定 惰气熔融红外吸收法/热导法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 33917-2017 |
Essential oils－Analysis by gas chromatography on chiral capillary columns－General method 精油 手性毛细管柱气相色谱分析 通用法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 33797-2017 |
Plastics—Determination of the ultimate anaerobic biodegradation under high-solids anaerobic-digestion conditions—Method by analysis of released biogas 塑料 在高固体份堆肥条件下最终厌氧生物分解能力的测定 采用分析测定释放生物气体的方法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 35212.1-2017 |
Analysis and evaluation methods of gas and solution and desulfurization decarbonization and sulfur recovery for natural gas treating plant—Part 1: Gas and solution analysis 天然气处理厂气体及溶液分析与脱硫、脱碳及硫磺回收分析评价方法 第1部分：气体及溶液分析 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 35212.2-2017 |
Analysis and evaluation methods of gas and solution and desulfurization decarbonization and sulfur recovery for natural gas treating plant—Part 2: Analysis of alkanolamine desulfurization decarbonization solvent 天然气处理厂气体及溶液分析与脱硫、脱碳及硫磺回收分析评价方法 第2部分：脱硫、脱碳溶剂分析 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 33360-2016 |
Gas analysis—Guidelines for purification of gases for trace analysis instrument 气体分析 痕量分析用气体纯化技术导则 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5832.1-2016 |
Gas analysis—Determination of water—Part 1: Electrolytic method 气体分析 微量水分的测定 第1部分：电解法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 33347-2016 |
Reciprocating internal combustion gas generating set—Classification and constituent analysis of gas fuels 往复式内燃燃气发电机组 气体燃料分类及组分分析方法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 33318-2016 |
Gas analysis—Determination of sulfide—Gas chromatography with sulfur chemiluminescence 气体分析 硫化物的测定 硫化学发光气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5832.2-2016 |
Gas analysis—Determination of water—Part 2: Dew point method 气体分析 微量水分的测定 第2部分：露点法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 30217.2-2016 |
Petroleum and natural gas industries—Drilling and production equipment—Part 2: Deepwater drilling riser analysis methodologies, operations and integrity 石油天然气工业 钻井和采油设备 第2部分：深水钻井隔水管的分析方法、操作和完整性 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 32263-2015 |
Highly purified compound—Reagent for pesticide residue analysis—Method of the gas chromatography with electron capture detector(ECD) 高纯化合物 农残分析用化合物的测定 气相色谱-电子捕获检测器（ECD）法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 31413-2015 |
Binders for paints and varnishes—Identification of gum rosin—Gas-chromatographic analysis 色漆和清漆用漆基 脂松香的鉴定 气相色谱分析法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 29613.2-2014 |
Rubber―Analysis by pyrolytic gas-chromatographic methods―Part 2: Determination of styrene/butadiene/isoprene ratio 橡胶 裂解气相色谱分析法 第2部分：苯乙烯/丁二烯/异戊二烯比率的测定 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 13610-2014 |
Analysis of natural gas composipion―Gas chromatography 天然气的组成分析 气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.9-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 9: Saturation method 气体分析 动态体积法制备校准用混合气体 第9部分:饱和法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.8-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 8: Diffusion method 气体分析 动态体积法制备校准用混合气体 第8部分：扩散法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.7-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 7: Thermal mass-flow controllers 气体分析 动态体积法制备校准用混合气体 第7部分：热式质量流量控制器 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.6-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 6: Critical orifices 气体分析 动态体积法制备校准用混合气体 第6部分：临界锐孔 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.5-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 5: Capillary calibration devices 气体分析 动态体积法制备校准用混合气体 第5部分：毛细管校准器 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.4-2014 |
Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 4: Continuous syringe injection method 气体分析 动态体积法制备校准用混合气体 第4部分：连续注射法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.2-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 2: Volumetric pumps 气体分析 动态体积法制备校准用混合气体 第2部分：容积泵 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.1-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 1: Methods of calibration 气体分析 动态体积法制备校准用混合气体 第1部分：校准方法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.11-2014 |
Gas analysis―Preparation of calibration gas mixtures using dynamic volumetric methods―Part 11: Electrochemical generation 气体分析 动态体积法制备校准用混合气体 第11部分：电化学发生法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 29874-2013 |
Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of residual vinyl chloride monomer by gas-chromatographic analysis of dry powder 塑料 氯乙烯均聚和共聚树脂 气相色谱法对干粉中残留氯乙烯单体的测定 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 29613.1-2013 |
Rubber - Analysis by pyrolytic gas-chromatographic methods - Part 1：Identification of polymers （single polymers and polymer blends） 橡胶 裂解气相色谱分析法 第1部分：聚合物（单一及并用）的鉴定 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 4325.25-2013 |
Methods for chemical analysis of molybdenum - Part 25: Determination of hydrogen content - Intert gas fusion infrared absorption method/thermal conductivity method 钼化学分析方法 第25部分：氢量的测定 惰气熔融红外吸收法/热导法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 4325.23-2013 |
Methods for chemical analysis of molybdenum - Part 23: Determination of oxygen and nitrogen contents - Inert gas fusion-infrared absorption and thermal conductivity method 钼化学分析方法 第23部分：氧量和氮量的测定 惰气熔融红外吸收法-热导法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 4324.26-2012 |
Methods for chemical analysis of tungsten - Part 26: Determination of nitrogen content - Pulse heating inert gas fusion-thermal conductive method and the Nessler reagent spectrophotometry 钨化学分析方法 第26部分：氮量的测定 脉冲加热惰气熔融-热导法和奈氏试剂分光光度法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 4324.25-2012 |
Methods for chemical analysis of tungsten - Part 25: Determination of oxygen content - Pulse heating inert gas fusion-infrared absorption method 钨化学分析方法 第25部分：氧量的测定 脉冲加热惰气熔融-红外吸收法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 28901-2012 |
Analysis of coke-oven gas composition by gas chromatography 焦炉煤气组分气相色谱分析方法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 28727-2012 |
Gas analysis - Determination of sulfides - Gas chromatograph with flame photometric detector 气体分析 硫化物的测定 火焰光度气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 28726-2012 |
Gas analysis - Gas chromatograph with helium ionization detector 气体分析 氦离子化气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 27894.1-2011 |
Natural gas - Determination of composition with defined uncertainty by gas chromatogramphy - Part 1：Guidelines for tailored analysis 天然气 在一定不确定度下用气相色谱法测定组成 第1部分：分析导则 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 17747.2-2011 |
Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis 天然气压缩因子的计算 第2部分：用摩尔组成进行计算 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 21650.3-2011 |
Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Part3: Analysis of micropores by gas adsorption 压汞法和气体吸附法测定固体材料孔径分布和孔隙度 第3部分：气体吸附法分析微孔 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 18294.5-2010 |
Technical identification methods for fire - Part 5: Gas chromatography-mass spectrometry analysis 火灾技术鉴定方法 第5部分：气相色谱-质谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 18340.6-2010 |
Organic geochemical analysis methods for geological samples - Part 6：Determination of gasoline group component - Mass spectrometry 地质样品有机地球化学分析方法 第6部分：汽油族组成测定 质谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 18340.5-2010 |
Organic geochemical analysis methods for geological samples - Part 5: Analysis of saturated hydrocarbons in rock extracts and crude oils - Gas chromatography 地质样品有机地球化学分析方法 第5部分：岩石提取物和原油中饱和烃分析 气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 18340.1-2010 |
Organic geochemical analysis methods for geological samples - Part 1： Analysis of light crude oils - Gas chromatography 地质样品有机地球化学分析方法 第1部分：轻质原油分析 气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 24624-2009 |
Insulated bushings - Guide for the interpretation of dissolved gas analysis(DGA)in bushings where oil is the impregnating medium of the main insulation(generally paper) 绝缘套管 油为主绝缘（通常为纸）浸渍介质套管中溶解气体分析（DGA）的判断导则 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5275.10-2009 |
Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 10: Permeation method 气体分析 动态体积法制备校准用混合气体 第10部分：渗透法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 23825-2009 |
Wood-based panels - Determination of formaldehyde release - Gas analysis method 人造板及其制品中甲醛释放量测定-气体分析法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 17377-2008 |
Animal and vegetable fats and oils - Analysis by gas chromatography of methyl esters of fatty acids 动植物油脂 脂肪酸甲酯的气相色谱分析 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 10410-2008 |
Analysis of manufactured gas and liquefied petroleum gas normal composition by gas chromatography 人工煤气和液化石油气常量组分气相色谱分析法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 11539-2008 |
Fragrance/Flavor substances - Analysis by gas chromatography on packed columns - General method 香料 填充柱气相色谱分析 通用法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 5274-2008 |
Gas analysis - Preparation of calibration gas mixture - Gravimetric method 气体分析 校准用混合气体的制备 称量法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 14850-2008 |
Gas analysis - Vocabulary 气体分析词汇 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 10628-2008 |
Gas analysis - Comparison methods for determining and checking the composition of calibration gas mixtures 气体分析 校准混合气组成的测定和校验 比较法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 21650.2-2008 |
Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Part 2: Analysis of mesopores and macropores by gas adsorption 压汞法和气体吸附法测定固体材料孔径分布和孔隙度 第2部分：气体吸附法分析介孔和大孔 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 18294.3-2006 |
Technical identification method for fire - Part 3：Gas chromatography analysis 火灾技术鉴定方法 第3部分：气相色谱法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 11538-2006 |
Essential oil - Analysis by gas chromatography on capillary columns - General method 精油 毛细管柱气相色谱分析 通用法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 10248-2005 |
Gas analysis-Preparation of calibration gas mixtures-Static volumetric methods 气体分析 校准用混合气体的制备 静态体积法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 7252-2001 |
Guide to the analysis and the diagnosis of gases dissolved in transformer oil 变压器油中溶解气体分析和判断导则 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 18295-2001 |
Analysis method of sandstone sample of petroleum and gas reservoir by scanning electron microscope 油气储层砂岩样品 扫描电子显微镜分析方法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 223.74-1997 |
Methods for chemical analysis of iron，steel and alloy--The combustion gravimetric/gas-volumetric method for the determination of non-combined carbon content 钢铁及合金化学分析方法 非化合碳含量的测定 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 14070-1993 |
Gas analysis--Preparation of calibration gas mixtures--Manometric method 气体分析 校准用混合气体的制备 压力法 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 13701-1992 |
Isotopic analysis of uranium by single-standard gas mass-spectrometer method 单标准气体质谱法铀同位素分析 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 6730.50-1986 |
Methods for chemical analysisof iron ores--The gas volumetric method for the determination of total carbon content 铁矿石化学分析方法 气体容量法测定总碳量 |
China National Standards Gas analysis Gas |
English PDF |
| GB/T 3653.2-1983 |
Methods for chemical analysis of ferroboron--The gasometric method for the determination of carbon content 硼铁化学分析方法 气体容量法测定碳量 |
China National Standards Gas analysis Gas |
English PDF |
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