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GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards; We provide Chinese GB standards and English version GB standards Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services. |
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 4701.2-2009 |
Ferrotitanium - Determination of silicon content - The sulphuric acid dehydration gravimetric method 钛铁 硅含量的测定 硫酸脱水重量法 |
China National Standards met |
 English PDF |
| GB/T 3710-2009 |
method of determination for crystallizing point of technical phenol and phenic acid 工业酚、苯酚结晶点测定方法 |
China National Standards met |
English PDF |
| GB/T 3208-2009 |
Standard test method for the total tulfur tontent in tenzene - Type products by oxidative microcoulometry 苯类产品总硫含量的微库仑测定方法 |
China National Standards met |
English PDF |
| GB/T 24214-2009 |
Quick determination method of water content in coal tar 煤焦油水分快速测定方法 |
China National Standards met |
English PDF |
| GB/T 24213-2009 |
General rules for original position statistic distribution analysis method 金属原位统计分布分析方法通则 |
China National Standards met |
English PDF |
| GB/T 24212-2009 |
methylnaphthalene oil 甲基萘油 |
China National Standards met |
English PDF |
| GB/T 24210-2009 |
Test method for the elastis modulus of whole graphite electrodes - Velocity of sound 整体石墨电极弹性模量试验 声速法 |
China National Standards met |
English PDF |
| GB/T 24205-2009 |
Iron ores fines - method for presentation the results of sintering test 铁矿粉 烧结试验结果表示方法 |
China National Standards met |
English PDF |
| GB/T 24204-2009 |
Iron ores for blast furnace feedstocks - Determination of low-temperature reduction-disintegration indices by dynamic method 高炉炉料用铁矿石 低温还原粉化率的测定 动态试验法 |
China National Standards met |
English PDF |
| GB/T 24203-2009 |
Carbon materials - Determination of the true density or true poroous-boiling method 炭素材料真密度、真气孔率测定方法 煮沸法 |
China National Standards met |
English PDF |
| GB/T 24201-2009 |
Test method for corrosion resistance of blast furnace brick to pig iron 高炉炭块抗铁水熔蚀性试验方法 |
China National Standards met |
English PDF |
| GB/T 24199-2009 |
Refined pyridine - Determination of pyridine content - Gas chromatographic method 纯吡啶中吡啶含量的气相色谱测定方法 |
China National Standards met |
English PDF |
| GB/T 24198-2009 |
Ferronickel - Determination of nickel, silicon, phosphorus, manganese, cobalt, chromium, and copper contents - Wavelength dispersive X-ray fluorescence spectrometry（Routine method） 镍铁 镍、硅、磷、锰、钴、铬和铜含量的测定 波长色散X-射线荧光光谱法(常规法) |
China National Standards met |
English PDF |
| GB/T 24196-2009 |
Corrosion of metals and alloys - Electrochemical test methods - Guidelines for conducting potentiostatic and potentiodynamic polarization measurements 金属和合金的腐蚀 电化学试验方法 恒电位和动电位极化测量导则 |
China National Standards met |
English PDF |
| GB/T 24195-2009 |
Corrosion of metals and alloys - Accelerated cyclic tests with exposure to acidified salt spray, “dry” and “wet” conditions 金属和合金的腐蚀 酸性盐雾、“干燥”和“湿润”条件下的循环加速腐蚀试验 |
China National Standards met |
English PDF |
| GB/T 24194-2009 |
Ferrosilicon - Determination of aluminium, calcium, manganese, chromium, titanium, copper, phosphorus and nickel content - Inductively coupled plasma atomic emission spectrometric method 硅铁 铝、钙、锰、铬、钛、铜、磷和镍含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards met |
English PDF |
| GB/T 24193-2009 |
Chromium ores and concentrates - Determination of aluminium, iron , magnesium and silicon content - Inductively coupled plasma atomic emission spectrometry 铬矿石和铬精矿 铝、铁、镁和硅含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards met |
English PDF |
| GB/T 24190-2009 |
Iron ores - Determination of combined water - Karl Fischer method 铁矿石 化合水含量的测定 卡尔费休滴定法 |
China National Standards met |
English PDF |
| GB/T 8215-2009 |
methods of inspection for bristles 猪鬃检验方法 |
China National Standards met |
English PDF |
| GB/T 4340.4-2009 |
metallic materials - Vickers hardness test - Part 4: Tables of hardness values 金属材料 维氏硬度试验 第4部分：硬度值表 |
China National Standards met |
English PDF |
| GB/T 4340.1-2009 |
metallic materials - Vickers hardness test - Part 1: Test method 金属材料 维氏硬度试验 第1部分：试验方法 |
China National Standards met |
English PDF |
| GB/T 24185-2009 |
Test method for measurement of hydrogen embrittlement threshold in steel by the incremental step loading method 逐级加力法测定钢中氢脆临界值试验方法 |
China National Standards met |
English PDF |
| GB/T 24183-2009 |
metallic materials - Earing test 金属材料 制耳试验方法 |
China National Standards met |
English PDF |
| GB/T 24182-2009 |
Mechanical testing of metals - Symbols and definitions in published standard 金属力学性能试验 出版标准中的符号及定义 |
China National Standards met |
English PDF |
| GB/T 24179-2009 |
metallic materials - Residual stress determination - The indentation strain-gage method 金属材料 残余应力测定 压痕应变法 |
China National Standards met |
English PDF |
| GB/T 24178-2009 |
Macrostructure assessing method for solidification structure of continuous casting blank 连铸钢坯凝固组织低倍评定方法 |
China National Standards met |
English PDF |
| GB/T 24177-2009 |
Standard test methods for characterizing duplex grain sizes 双重晶粒度表征与测定方法 |
China National Standards met |
English PDF |
| GB/T 24176-2009 |
metallic materials - Fatigue testing - Statistical planning and analysis of data 金属材料 疲劳试验 数据统计方案与分析方法 |
China National Standards met |
English PDF |
| GB/T 24175-2009 |
Test method for stability of steel slag 钢渣稳定性试验方法 |
China National Standards met |
English PDF |
| GB/T 24173-2009 |
Steel sheets - Secondary work embrittlement testing method 钢板 二次加工脆化试验方法 |
China National Standards met |
English PDF |
| GB/T 24172-2009 |
method for evaluation of tensile properties of metallic superplastic materials 金属超塑性材料拉伸性能测定方法 |
China National Standards met |
English PDF |
| GB/T 24171.2-2009 |
metallic materials - Sheet and strip - Determinations of forming limit curves - Part 2: Determinations of forming limit curves in laboratory 金属材料 薄板和薄带 成形极限曲线的测定 第2部分：实验室成形极限曲线的测定 |
China National Standards met |
English PDF |
| GB/T 24171.1-2009 |
metallic materials - Sheet and strip - Determination of forming limit curves - Part 1: Measurement and application of forming limit diagrams in press shop 金属材料 薄板和薄带 成形极限曲线的测定 第1部分：冲压车间成形极限图的测量及应用 |
China National Standards met |
English PDF |
| GB/T 24170.1-2009 |
Surface antibacterial stainless steel - Part 1: Electrochemical method 表面抗菌不锈钢 第1部分：电化学法 |
China National Standards met |
English PDF |
| GB/T 24169-2009 |
Determination of perfluorooctane sulfonates (PFOS) in the fluorine-containing products and consumer products - High performance liquid chromatography-tandem mass spectrometry 氟化工产品和消费品中全氟辛烷磺酰基化合物（PFOS）的测定 高效液相色谱-串联质谱法 |
China National Standards met |
English PDF |
| GB/T 231.4-2009 |
metallic materials - Brinell hardness test - Part 4: Tables of hardness values 金属材料 布氏硬度试验 第4部分：硬度值表 |
China National Standards met |
English PDF |
| GB/T 231.1-2009 |
metallic materials - Brinell hardness test - Part 1: Test method 金属材料 布氏硬度试验 第1部分：试验方法 |
China National Standards met |
English PDF |
| GB/T 230.1-2009 |
metallic materials - Rockwell hardness test - Part 1: Test method(scales A、B、C、D、E、F、G、H、K、N、T) 金属材料 洛氏硬度试验 第1部分：试验方法（A、B、C、D、E、F、G、H、K、N、T标尺） |
China National Standards met |
English PDF |
| GB/T 18449.4-2009 |
metallic materials - Knoop hardness test - Part 4: Tables of hardness values 金属材料 努氏硬度试验 第4部分：硬度值表 |
China National Standards met |
English PDF |
| GB/T 18449.1-2009 |
metallic materials - Knoop hardness test - Part 1: Test method 金属材料 努氏硬度试验 第1部分：试验方法 |
China National Standards met |
English PDF |
| GB/T 15006-2009 |
General rules of dimensions，shape,surface quality, test method and inspection for elastic alloys 弹性合金的尺寸、外形、表面质量、试验方法和检验规则的一般规定 |
China National Standards met |
English PDF |
| GB/T 24156-2009 |
Electric motorcycles and electric mopeds - Power performance - Test methods 电动摩托车和电动轻便摩托车 动力性能 试验方法 |
China National Standards met |
English PDF |
| GB 24162-2009 |
Periodic inspection and evaluation of hoop wrapped fibre reinforced composite gas cylinders with metal liners of compressed natural gas for automotive vehicles 汽车用压缩天然气金属内胆纤维环缠绕气瓶定期检验与评定 |
China National Standards met |
English PDF |
| GB/T 4802.4-2009 |
Textiles - Determination of fabric propensity to surface fuzzing and to pilling - Part 4: Random rolling method 纺织品 织物起毛起球性能的测定 第4部分：随机翻滚法 |
China National Standards met |
English PDF |
| GB/T 4743-2009 |
Textiles - Yarn from packages - Determination of linear density(mass per unit length) by the skein methord 纺织品 卷装纱 绞纱法线密度的测定 |
China National Standards met |
English PDF |
| GB/T 3292.2-2009 |
Textiles - Unevenness of textile strands - Part 2: Photoelectricity method 纺织品 纱线条干不匀试验方法 第2部分：光电法 |
China National Standards met |
English PDF |
| GB/T 2912.3-2009 |
Textiles - Determination of formaldehyde - Part 3: High performance liquid chromatography method 纺织品 甲醛的测定 第3部分：高效液相色谱法 |
China National Standards met |
English PDF |
| GB/T 24277-2009 |
A method for assessing the short-circuit withstand strength of partially type-tested assemblies (PTTA) 评估部分型式试验成套设备（PTTA）短路耐受强度的一种方法 |
China National Standards met |
English PDF |
| GB/T 24276-2009 |
A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear 评估部分型式试验的低压成套开关设备和控制设备（PTTA）温升的外推法 |
China National Standards met |
English PDF |
| GB/T 24273-2009 |
Test method for electrical properties of electrical contact materials 电触头材料电性能试验方法 |
China National Standards met |
English PDF |
| GB/T 24272-2009 |
Test method for mechanical torque rate of spiral coils of thermostat metal 热双金属平螺旋形元件机械转矩率试验方法 |
China National Standards met |
English PDF |
| GB/T 24271-2009 |
Specification for strip component of thermostat metals 热双金属条形元件技术条件 |
China National Standards met |
English PDF |
| GB/T 24270-2009 |
method of measurement of temperature coefficient of magnetic properties of permanent magnetic materials 永磁材料磁性能温度系数测量方法 |
China National Standards met |
English PDF |
| GB/T 24268-2009 |
Test methods for chemical analysis of silver-tin oxide electric contact material 银氧化锡电触头材料化学分析方法 |
China National Standards met |
English PDF |
| GB/T 24218.2-2009 |
Textiles - Test methods for nonwovens - Part 2: Determination of thickness 纺织品 非织造布试验方法 第2部分：厚度的测定 |
China National Standards met |
English PDF |
| GB/T 24218.1-2009 |
Textiles - Test methods for nonwovens - Part 1: Determination of mass per unit area 纺织品 非织造布试验方法 第1部分：单位面积质量的测定 |
China National Standards met |
English PDF |
| GB/T 21655.2-2009 |
Textiles - Evaluation of absorption and quick-drying - Part 2: method for moisture management tests 纺织品 吸湿速干性的评定 第2部分：动态水分传递法 |
China National Standards met |
English PDF |
| GB/T 13762-2009 |
Geosynthetics - Test method for the determination of mass per unit area of geotextiles and geotextile-related products 土工合成材料 土工布及土工布有关产品单位面积质量的测定方法 |
China National Standards met |
English PDF |
| GB/T 12705.2-2009 |
Textile - methods of testing the down-proof properties of fabrics - Part 2: Tumble test 纺织品 织物防钻绒性试验方法 第2部分：转箱法 |
China National Standards met |
English PDF |
| GB/T 12705.1-2009 |
Textile - methods of testing the down-proof properties of fabrics - Part 1: Rubbing test 纺织品 织物防钻绒性试验方法 第1部分：摩擦法 |
China National Standards met |
English PDF |
| GB/T 24143-2009 |
Rubber and rubber products - Determination of the sensitivity of test methods 橡胶与橡胶制品 试验方法灵敏度的确定 |
China National Standards met |
English PDF |
| GB/T 24129-2009 |
Testing method for the non-marking outsole of rubber shoes and sports shoes 胶鞋、运动鞋外底不留痕试验方法 |
China National Standards met |
English PDF |
| GB/T 24128-2009 |
method for testing resistance of plastics to mold 塑料防霉性能试验方法 |
China National Standards met |
English PDF |
| GB/T 24127-2009 |
Testing method for determining algal resistance of plastics 塑料抗藻性能试验方法 |
China National Standards met |
English PDF |
| GB/T 19466.6-2009 |
Plastics - Differential scanning calorimetry（DSC）- Part 6: Determination of oxidation induction time（isothermal OIT）and oxidation induction temperature（dynamic OIT） 塑料 差示扫描量热法（DSC）第6部分：氧化诱导时间(等温OIT)和氧化诱导温度（动态OIT）的测定 |
China National Standards met |
English PDF |
| GB/T 16578.2-2009 |
Plastics - Film and sheeting - Determination of tear resistance - Part 2: Elmendorf method 塑料 薄膜和薄片 耐撕裂性能的测定 第2部分：埃莱门多夫（Elmendor）法 |
China National Standards met |
English PDF |
| GB/T 14838-2009 |
Rubber and rubber products - Determination of precision for test method standards 橡胶与橡胶制品 试验方法标准精密度的确定 |
China National Standards met |
English PDF |
| GB/T 12009.3-2009 |
Plastics - Polymethylene polyphenyl isocyanate - Part 3: Determination of viscosity 塑料 多亚甲基多苯基异氰酸酯 第3部分：黏度的测定 |
China National Standards met |
English PDF |
| GB/T 15597.1-2009 |
Plastics - Poly(methyl methacrylate)(PMMA)moulding and extrusion materials - Part 1: Designation system and basis for specifications 塑料 聚甲基丙烯酸甲酯（PMMA）模塑和挤塑材料 第1部分：命名系统和分类基础 |
China National Standards met |
English PDF |
| GB/T 2910.9-2009 |
Textiles - Quantitative chemical analysis - Part 9: Mixtures of acetate and triacetate fibres (method using benzyl alcohol) 纺织品 定量化学分析 第9部分：醋酯纤维与三醋酯纤维混合物（苯甲醇法） |
China National Standards met |
English PDF |
| GB/T 2910.8-2009 |
Textiles - Quantitative chemical analysis - Part 8: Mixtures of acetate and triacetate fibres (method using acetone) 纺织品 定量化学分析 第8部分：醋酯纤维与三醋酯纤维混合物(丙酮法) |
China National Standards met |
English PDF |
| GB/T 2910.7-2009 |
Textiles - Quantitative chemical analysis - Part 7: Mixtures of polyamide and certain other fibres (method using formic acid) 纺织品 定量化学分析 第7部分：聚酰胺纤维与某些其他纤维混合物（甲酸法） |
China National Standards met |
English PDF |
| GB/T 2910.6-2009 |
Textiles - Quantitative chemical analysis - Part 6: Mixtures of viscose or certain types of cupro or modal or lyocell and cotton fibres (method using formic acid and zinc chloride) 纺织品 定量化学分析 第6部分：粘胶纤维、某些铜氨纤维、莫代尔纤维或莱赛尔纤维与棉的混合物（甲酸/氯化锌法） |
China National Standards met |
English PDF |
| GB/T 2910.5-2009 |
Textiles - Quantitative chemical analysis - Part 5: Mixtures of viscose,cupro or modal and cotton fibres (method using sodium zincate) 纺织品 定量化学分析 第5部分：粘胶纤维、铜氨纤维或莫代尔纤维与棉的混合物（锌酸钠法） |
China National Standards met |
English PDF |
| GB/T 2910.4-2009 |
Textiles - Quantitative chemical analysis - Part 4: Mixtures of certain protein and certain other fibers (method using hypochlorite) 纺织品 定量化学分析 第4部分：某些蛋白质纤维与某些其他纤维的混合物(次氯酸盐法) |
China National Standards met |
English PDF |
| GB/T 2910.3-2009 |
Textiles - Quantitative chemical analysis - Part 3: Mixtures of acetate and certain other fibres (method using acetone) 纺织品 定量化学分析 第3部分：醋酯纤维与某些其他纤维的混合物（丙酮法） |
China National Standards met |
English PDF |
| GB/T 2910.24-2009 |
Textiles - Quantitative chemical analysis - Part 24: Mixtures of polyester and some other fibers (method using phenol and tetrachloroethane) 纺织品 定量化学分析 第24部分：聚酯纤维与某些其他纤维的混合物（苯酚/四氯乙烷法） |
China National Standards met |
English PDF |
| GB/T 2910.23-2009 |
Textiles - Quantitative chemical analysis - Part 23: Mixtures of polyethylene and polypropylene (method using cyclohexanone) 纺织品 定量化学分析 第23部分：聚乙烯纤维与聚丙烯纤维的混合物（环己酮法） |
China National Standards met |
English PDF |
| GB/T 2910.22-2009 |
Textiles - Quantitative chemical analysis - Part 22: Mixtures of viscose or certain types of cupro or modal or lyocell and flax of ramie fibres (method using formic acid and zinc chloride) 纺织品 定量化学分析 第22部分：粘胶纤维、某些铜氨纤维、莫代尔纤维或莱赛尔纤维与亚麻、苎麻的混合物（甲酸/氯化锌法） |
China National Standards met |
English PDF |
| GB/T 2910.21-2009 |
Textiles - Quantitative chemical analysis - Part 21: Mixtures of chlorofibers, certain modacrylics, certain elastanes, acetates, triacetates and certain other fibers (method using cyclohexanone) 纺织品 定量化学分析 第21部分：含氯纤维、某些改性聚丙烯腈纤维、某些弹性纤维、醋酯纤维、三醋酯纤维与某些其他纤维的混合物（环己酮法） |
China National Standards met |
English PDF |
| GB/T 2910.20-2009 |
Textiles - Quantitative chemical analysis - Part 20: Mixtures of elastane and some other fibers (method of using dimethylacetamide) 纺织品 定量化学分析 第20部分：聚氨酯弹性纤维与某些其他纤维的混合物（二甲基乙酰胺法） |
China National Standards met |
English PDF |
| GB/T 2910.19-2009 |
Textiles - Quantitative chemical analysis - Part 19: Mixtures of cellulose fibres and asbestos (method by heating) 纺织品 定量化学分析 第19部分：纤维素纤维与石棉的混合物（加热法） |
China National Standards met |
English PDF |
| GB/T 2910.18-2009 |
Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk and wool or hair (method using sulfuric acid) 纺织品 定量化学分析 第18部分：蚕丝与羊毛或其他动物毛纤维的混合物（硫酸法） |
China National Standards met |
English PDF |
| GB/T 2910.17-2009 |
Textiles - Quantitative chemical analysis - Part 17: Mixtures of chlorofibers (homopolymers of vinyl chloride) and certain other fibers (method using sulfuric acid) 纺织品 定量化学分析 第17部分：含氯纤维（氯乙烯均聚物）与某些其他纤维的混合物（硫酸法） |
China National Standards met |
English PDF |
| GB/T 2910.16-2009 |
Textiles - Quantitative chemical analysis - Part 16: Mixtures of polypropylene and certain other fibres (method using xylene) 纺织品 定量化学分析 第16部分：聚丙烯纤维与某些其他纤维的混合物（二甲苯法） |
China National Standards met |
English PDF |
| GB/T 2910.15-2009 |
Textiles - Quantitative chemical analysis - Part 15: Mixtures of jute and certain animal fibres (method by determining nitrogen content) 纺织品 定量化学分析 第15部分：黄麻与某些动物纤维的混合物（含氮量法） |
China National Standards met |
English PDF |
| GB/T 2910.14-2009 |
Textiles - Quantitative chemical analysis - Part 14: Mixtures of acetate and certain chlorofibres (method using acetic acid) 纺织品 定量化学分析 第14部分：醋酯纤维与某些含氯纤维的混合物（冰乙酸法） |
China National Standards met |
English PDF |
| GB/T 2910.13-2009 |
Textiles - Quantitative chemical analysis - Part 13: Mixtures of certain chlorofibers and certain other fibers(method using carbon disulfide /acetone) 纺织品 定量化学分析 第13部分：某些含氯纤维与某些其他纤维的混合物（二硫化碳/丙酮法） |
China National Standards met |
English PDF |
| GB/T 2910.12-2009 |
Textiles - Quantitative chemical analysis - Part 12: Mixtures of acrylic,certain modacrylic,certain chlorofibres,certain elastanes and certain other fibres (method using dimethylformamide ) 纺织品 定量化学分析 第12部分：聚丙烯腈纤维、某些改性聚丙烯腈纤维、某些含氯纤维或某些弹性纤维与某些其他纤维的混合物（二甲基甲酰胺法） |
China National Standards met |
English PDF |
| GB/T 2910.11-2009 |
Textiles - Quantitative chemical analysis - Part 11: Mixtures of cellulose and polyester fibres (method using sulfuric acid) 纺织品 定量化学分析 第11部分：纤维素纤维与聚酯纤维的混合物（硫酸法） |
China National Standards met |
English PDF |
| GB/T 2910.10-2009 |
Textiles - Quantitative chemical analysis - Part 10: Mixtures of triacetate or polylactide and certain other fibres (method using dichloromethane) 纺织品 定量化学分析 第10部分：三醋酯纤维或聚乳酸纤维与某些其他纤维的混合物（二氯甲烷法） |
China National Standards met |
English PDF |
| GB/T 4935.2-2009 |
Instrument for soil test - Oedometer - Part 2: Pneumatic oedometer 土工试验仪器 固结仪 第2部分：气压式固结仪 |
China National Standards met |
English PDF |
| GB/T 24105-2009 |
Basic conditions and methods of environmental test for geotechnical engineering instrument 岩土工程仪器基本环境试验条件及方法 |
China National Standards met |
English PDF |
| GB/T 24104-2009 |
method of model and nomenclature for instrument for geotechnical engineering 岩土工程仪器型号命名方法 |
China National Standards met |
English PDF |
| GB/T 2912.2-2009 |
Textiles - Determination of formaldehyde - Part 2: Released formaldehyde (vapour absorption method) 纺织品 甲醛的测定 第2部分：释放的甲醛（蒸汽吸收法） |
China National Standards met |
English PDF |
| GB/T 2912.1-2009 |
Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde(water extraction method) 纺织品 甲醛的测定 第1部分：游离和水解的甲醛（水萃取法） |
China National Standards met |
English PDF |
| GB/T 5132.2-2009 |
Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical purposes - Part 2: methods of test 电气用热固性树脂工业硬质圆形层压管和棒 第2部分：试验方法 |
China National Standards met |
English PDF |
| GB/T 5019.2-2009 |
Specification for insulating materials based on mica - Part 2: methods of test 以云母为基的绝缘材料 第2部分：试验方法 |
China National Standards met |
English PDF |
| GB/T 24123-2009 |
metallized film for capacitors 电容器用金属化薄膜 |
China National Standards met |
English PDF |
| GB/T 1981.2-2009 |
Varnishes used for electrical insulation - Part 2: methods of test 电气绝缘用漆 第2部分：试验方法 |
China National Standards met |
English PDF |
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