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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 40729-2021 |
Fatigue life test method for preciSiOn gear transmission 精密齿轮传动装置疲劳寿命试验方法 |
China National Standards SiO |
 English PDF |
| GB/T 40796-2021 |
CorroSiOn of metals and alloys—Guidelines for applying statistics to analysis of corrosion data 金属和合金的腐蚀 腐蚀数据分析应用统计学指南 |
China National Standards SiO |
English PDF |
| GB/T 1002-2021 |
Single phase plugs and socket-outlets for household and similar purposes—Types,basic parameters and dimenSiOns 家用和类似用途单相插头插座 型式、基本参数和尺寸 |
China National Standards SiO |
English PDF |
| GB/T 40768-2021 |
Specifications for video stream and spatial-temporal information fuSiOn encoding 视频流与时空信息融合编码规范 |
China National Standards SiO |
English PDF |
| GB 39800.4-2020 |
Specifications for the proviSiOn of personal protective equipment—Part 4：Non-coal mines 个体防护装备配备规范 第4部分：非煤矿山 |
China National Standards SiO |
English PDF |
| GB 39800.3-2020 |
Specifications for the proviSiOn of personal protective equipment—Part 3：Metallurgy,nonferrous metals 个体防护装备配备规范 第3部分：冶金、有色 |
China National Standards SiO |
English PDF |
| GB 39800.2-2020 |
Specification of the proviSiOn of personal protective equipment—Part 2: Oil, chemical and gas industry 个体防护装备配备规范 第2部分：石油、化工、天然气 |
China National Standards SiO |
English PDF |
| GB 39800.1-2020 |
Specification of the proviSiOn of personal protective equipment—Part 1: General requirement 个体防护装备配备规范 第1部分：总则 |
China National Standards SiO |
English PDF |
| GB 39728-2020 |
EmisSiOn standard of air pollutants for onshore oil and gas exploitation and production industry 陆上石油天然气开采工业大气污染物排放标准 |
China National Standards SiO |
English PDF |
| GB 39727-2020 |
EmisSiOn standard of air pollutants for pesticides industry 农药制造工业大气污染物排放标准 |
China National Standards SiO |
English PDF |
| GB 39726-2020 |
EmisSiOn standard of air pollutants for foundry industry 铸造工业大气污染物排放标准 |
China National Standards SiO |
English PDF |
| GB/T 51422-2021 |
Technical standard for auto tracking and targeting jet suppresSiOn system 建筑金属板围护系统检测鉴定及加固技术标准 |
China National Standards SiO |
English PDF |
| GB 51427-2021 |
Technical standard for auto tracking and targeting jet suppresSiOn system 自动跟踪定位射流灭火系统技术标准 |
China National Standards SiO |
English PDF |
| GB/T 39523-2020 |
Test method for torSiOnal vibration of precision planetary cycloidal reducers 精密行星摆线减速器扭转振动性能测试方法 |
China National Standards SiO |
English PDF |
| GB/T 39507-2020 |
Leather—Physical and mechanical tests—Determination of abraSiOn resistance：Martindale ball plate method 皮革 物理和机械试验 耐磨性能的测定：马丁代尔球盘法 |
China National Standards SiO |
English PDF |
| GB/T 39519-2020 |
Hydranlic cylindrically helical compresSiOn spring with high working stress—Technical specifications 高应力液压件圆柱螺旋压缩弹簧 技术条件 |
China National Standards SiO |
English PDF |
| GB/T 39534-2020 |
CorroSiOn of metals and alloys—Method for determination of the uniform corrosion rate of stainless steels and nickel based alloys in liquids 金属和合金的腐蚀 液体中不锈钢和镍基合金均匀腐蚀速率测定方法 |
China National Standards SiO |
English PDF |
| GB/T 39539-2020 |
Technical requirements for determination of gas diffuSiOn coefficient in shale reservoir 页岩储层气体扩散系数的测定技术要求 |
China National Standards SiO |
English PDF |
| GB 8369.2-2020 |
TransfuSiOn sets for single use—Part 2: With pressure infusion apparatus use 一次性使用输血器 第2部分：压力输血设备用 |
China National Standards SiO |
English PDF |
| GB/T 39138.3-2020 |
Methods for chemical analysis of gold nickel chromium iron silicon boron alloys—Part 3：Determination of chromium, iron, silicon and boron contents—Inductively coupled plasma atomic emisSiOn spectrometry 金镍铬铁硅硼合金化学分析方法 第3部分：铬、铁、硅、硼含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 39143-2020 |
Methods for chemical analysis of gold-arsenic alloys—Determination of arsenic content—Inductively coupled plasma atomic emisSiOn spectrometry 金砷合金化学分析方法 砷含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 39146-2020 |
Refractory materials—Test method of corroSiOn resistance to molten aluminum alloy 耐火材料 抗熔融铝合金侵蚀试验方法 |
China National Standards SiO |
English PDF |
| GB/T 39130-2020 |
Measuring method for adheSiOn of zinc coating for galvanized products 镀锌产品锌层附着性试验方法 |
China National Standards SiO |
English PDF |
| GB/T 39133-2020 |
Suspender of suspenSiOn bridge 悬索桥吊索 |
China National Standards SiO |
English PDF |
| GB/T 39141.1-2020 |
Mineral and sapphire watch-glasses—Part 1：DimenSiOns and tolerances 无机和蓝宝石手表玻璃 第1部分：尺寸和公差 |
China National Standards SiO |
English PDF |
| GB/T 39154-2020 |
CorroSiOn of metals and alloys—Cathodic protection of steel in concrete 金属和合金的腐蚀 混凝土用钢筋的阴极保护 |
China National Standards SiO |
English PDF |
| GB/T 39155-2020 |
CorroSiOn of metals and alloys—Cathodic protection of harbour installations 金属和合金的腐蚀 海港设施的阴极保护 |
China National Standards SiO |
English PDF |
| GB/T 39184-2020 |
Code of practice for installation and commisSiOning of ROV launch and recovery system/umbilical winch ROV收放装置/脐带绞车安装与调试规程 |
China National Standards SiO |
English PDF |
| GB/T 39187-2020 |
Jack up conductor/blow out preventer tenSiOn compensation system 自升式平台隔水管/防喷器张力补偿系统 |
China National Standards SiO |
English PDF |
| GB/T 39206-2020 |
Code of practice for installation and commisSiOning of fixed azimuth thruster 固定式全回转舵桨装置安装与调试规程 |
China National Standards SiO |
English PDF |
| GB/T 39207-2020 |
Code of practice for installation and commisSiOning of anchor handling system 锚处理系统安装与调试规程 |
China National Standards SiO |
English PDF |
| GB/T 39208-2020 |
Code of practice for installation and commisSiOning of retractable azimuth thruster 可伸缩式全回转舵桨装置安装与调试规程 |
China National Standards SiO |
English PDF |
| GB 39220-2020 |
Limits and monitoring methods of total electric field of DC transmisSiOn project 直流输电工程合成电场限值及其监测方法 |
China National Standards SiO |
English PDF |
| GB/T 34609.2-2020 |
Method for chemical analysis of rhodium compounds—Part 2: Determination of silver,gold,platinum...potassium,chromium and silicon contents—Inductively coupled plasma atomic emisSiOn spectrometry 铑化合物化学分析方法 第2部分：银、金、铂、钯、铱、钌、铅、镍、铜、铁、锡、锌、镁、锰、铝、钙、钠、钾、铬、硅含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 39095-2020 |
Aerospace—Hydraulic fluid components—ExpresSiOn of particulate contamintion levels 航空航天 液压流体零部件 颗粒污染度等级的表述 |
China National Standards SiO |
English PDF |
| GB/T 39005-2020 |
General technical requirements of viSiOn integrated system for industrial robots 工业机器人视觉集成系统通用技术要求 |
China National Standards SiO |
English PDF |
| GB/T 24242.1-2020 |
Non-alloy steel wire rod for converSiOn to wire—Part 1：General requirements 制丝用非合金钢盘条 第1部分：一般要求 |
China National Standards SiO |
English PDF |
| GB/T 24242.2-2020 |
Non-alloy steel wire rod for converSiOn to wire —Part 2：Specific requirements for general purpose wire rod 制丝用非合金钢盘条 第2部分:一般用途盘条 |
China National Standards SiO |
English PDF |
| GB/T 24242.4-2020 |
Non-alloy steel wire rod for converSiOn to wire —Part 4：Specific requirements for special purpose wire rod 制丝用非合金钢盘条 第4部分：特殊用途盘条 |
China National Standards SiO |
English PDF |
| GB/T 39059-2020 |
Determination of harmful substance emisSiOns from synthetic sports surfaces—Environmental chambers method 运动场地合成材料面层有害物质释放量的测定 环境测试舱法 |
China National Standards SiO |
English PDF |
| GB 30612-2014 |
National food safety standard - Food Additives - Polydimethylsiloxane (PDMS) and Its EmulSiOn + No.1 modification sheet 食品安全国家标准 食品添加剂 聚二甲基硅氧烷及其乳液+《第1号修改单》 |
China National Standards SiO |
English PDF |
| GB 9706.205-2020 |
Medical electrical equipment—Part 2-5: Particular requirements for the basic safety and essential performance of ultrasonic phySiOtherapy equipment 医用电气设备 第2-5部分：超声理疗设备的基本安全和基本性能专用要求 |
China National Standards SiO |
English PDF |
| GB 20653-2020 |
Protective clothing—High visibility warning clothing for profesSiOnal use 防护服装 职业用高可视性警示服 |
China National Standards SiO |
English PDF |
| GB 24850-2020 |
Minimum allowable values of energy efficiency and energy efficiency grades for flat panel televiSiOns and set-top boxes 平板电视与机顶盒能效限定值及能效等级 |
China National Standards SiO |
English PDF |
| GB/T 38976-2020 |
Test method for the oxygen concentration in silicon materials—Inert gas fuSiOn infrared detection method 硅材料中氧含量的测试 惰性气体熔融红外法 |
China National Standards SiO |
English PDF |
| GB/T 38982-2020 |
Method of measuring shape and dimenSiOn for wrought titanium and titanium alloy products 钛及钛合金加工产品外形尺寸检测方法 |
China National Standards SiO |
English PDF |
| GB/T 8813-2020 |
Rigid cellular plastics—Determination of compresSiOn properties 硬质泡沫塑料 压缩性能的测定 |
China National Standards SiO |
English PDF |
| GB/T 24328.6-2020 |
Tissue paper and tissue products—Part 6: Determination of water-absorption time and water-absorption capacity—Basket-immerSiOn test method 卫生纸及其制品 第6部分: 吸水时间和吸水能力的测定 篮筐浸没法 |
China National Standards SiO |
English PDF |
| GB/T 38958-2020 |
Wrought aluminum alloy preciSiOn forging—Technological specification 变形铝合金精密锻造 工艺规范 |
China National Standards SiO |
English PDF |
| GB/T 25085.4-2020 |
Road vehicles—Automotive cables—Part 4: DimenSiOns and requirements for 30 V a.c. or 60 V d.c. single-core aluminium conductor cables 道路车辆 汽车电缆 第4部分：交流30 V或直流60 V单芯铝导体电缆的尺寸和要求 |
China National Standards SiO |
English PDF |
| GB/T 39030-2020 |
Technical specification of phySiOlogical activity evaluation for enzyme preparations 酶制剂生理活性评价技术规范 |
China National Standards SiO |
English PDF |
| GB/T 39081-2020 |
Test method of cross tenSiOn test for resistance spot and embossed projection welds 电阻点焊及凸焊接头的十字拉伸试验方法 |
China National Standards SiO |
English PDF |
| GB/T 26998-2020 |
Examination and assessment for profesSiOnal managers 职业经理人考试测评 |
China National Standards SiO |
English PDF |
| GB/T 39542.1-2020 |
Mechanical pencils for technical drawings—Part 1: Classification, dimenSiOns, performance requirements and testing 技术制图活动铅笔 第1部分：分类、尺寸、性能要求和试验 |
China National Standards SiO |
English PDF |
| GB/T 39542.2-2020 |
Mechanical pencils for technical drawings—Part 2: Black leads—Classification and dimenSiOns 技术制图活动铅笔 第2部分：黑铅芯 分类和尺寸 |
China National Standards SiO |
English PDF |
| GB/T 38902-2020 |
Determination of hollow fiber membrane cross-section dimenSiOns—Image analysis method 中空纤维膜丝截面结构尺寸的测定 图像分析法 |
China National Standards SiO |
English PDF |
| GB/T 20975.25-2020 |
Methods for chemical analysis of aluminium and aluminium alloys—Part 25：Determination of elements content—Inductively coupled plasma atomic emisSiOn spectrometric method 铝及铝合金化学分析方法 第25部分：元素含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 20671.6-2020 |
Classification system and test methods for nonmetallic gasket materials—Part 6: Standard test method for adheSiOn of gasket materials to metal surfaces 非金属垫片材料分类体系及试验方法 第6部分：垫片材料与金属表面黏附性试验方法 |
China National Standards SiO |
English PDF |
| GB/T 12967.1-2020 |
Test methods for anodic oxidation coatings and organic polymer coatings of aluminium and aluminium alloys―Part 1: Measurement of abraSiOn resistance 铝及铝合金阳极氧化膜及有机聚合物膜检测方法 第1部分：耐磨性的测定 |
China National Standards SiO |
English PDF |
| GB/T 11376-2020 |
Metallic and other inorganic coatings—Phosphate converSiOn coating of metals 金属及其他无机覆盖层 金属的磷化膜 |
China National Standards SiO |
English PDF |
| GB/T 38960-2020 |
Cryogenic-resistant controlled expanSiOn alloys 耐低温定膨胀合金 |
China National Standards SiO |
English PDF |
| GB/T 38940-2020 |
PreciSiOn expansion alloys for sealing to silicon and silicon components 硅组件用精密封接合金 |
China National Standards SiO |
English PDF |
| GB/T 38939-2020 |
Nickel-based alloy—Determination of multi-element contents—Spark discharge atomic emisSiOn spectrometric method(routine method) 镍基合金 多元素含量的测定 火花放电原子发射光谱分析法（常规法） |
China National Standards SiO |
English PDF |
| GB/T 38938-2020 |
High strength and low expanSiOn alloy 高强度低膨胀合金 |
China National Standards SiO |
English PDF |
| GB/T 38933-2020 |
Cold rolled steel sheet for automobile—Test method of phosphate converSiOn coatings 汽车用冷轧钢板 磷酸盐转化膜试验方法 |
China National Standards SiO |
English PDF |
| GB/T 38878-2020 |
System tests for the projects of high-voltage direct current (HVDC) transmisSiOn power using voltage sourced converters (VSC) 柔性直流输电工程系统试验 |
China National Standards SiO |
English PDF |
| GB/T 38875-2020 |
Reduced activation martensitic steel plates with heat-resistance and corroSiOn-resistance for nuclear facilities 核电用耐高温抗腐蚀低活化马氏体结构钢板 |
China National Standards SiO |
English PDF |
| GB/T 38818-2020 |
Steel wire ropes for hanger of suspenSiOn bridge 悬索桥吊索用钢丝绳 |
China National Standards SiO |
English PDF |
| GB/T 38812.3-2020 |
Direct reduced iron—Determination of silicon, manganese, phosphorus, vanadium, titanium, copper, aluminum, arsenic, magnesium, calcium, potassium and sodium content—Inductively coupled plasma atomic emisSiOn spectrometric method 直接还原铁 硅、锰、磷、钒、钛、铜、铝、砷、镁、钙、钾、钠含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 38794-2020 |
Chemical safety in furniture—Determination of formaldehyde emisSiOn 家具中化学物质安全 甲醛释放量的测定 |
China National Standards SiO |
English PDF |
| GB/T 25085.3-2020 |
Road vehicles—Automotive cables—Part 3: DimenSiOns and requirements for 30 V a.c. or 60 V d.c. single-core copper conductor cables 道路车辆 汽车电缆 第3部分：交流30 V或直流60 V单芯铜导体电缆的尺寸和要求 |
China National Standards SiO |
English PDF |
| GB/T 24522-2020 |
Metallic materials—Method of test for the determination of resistance to stable crack extenSiOn using specimens of low constraint 金属材料 低拘束试样测定稳态裂纹扩展阻力的试验方法 |
China National Standards SiO |
English PDF |
| GB/T 9771.6-2020 |
Single-mode optical fibres for telecommunication—Part 6: Characteristics of a fibre with non-zero disperSiOn for wideband optical transport 通信用单模光纤 第6部分：宽波长段光传输用非零色散单模光纤特性 |
China National Standards SiO |
English PDF |
| GB/T 9771.5-2020 |
Single-mode optical fibres for telecommunication—Part 5: Characteristics of a non-zero disperSiOn shifted single-mode optical fibre 通信用单模光纤 第5部分：非零色散位移单模光纤特性 |
China National Standards SiO |
English PDF |
| GB/T 9771.4-2020 |
Single-mode optical fibres for telecommunication—Part 4: Characteristics of a disperSiOn shifted single-mode optical fibre 通信用单模光纤 第4部分：色散位移单模光纤特性 |
China National Standards SiO |
English PDF |
| GB/T 9771.3-2020 |
Single-mode optical fibres for telecommunication—Part 3: Characteristics of an extended wavelength band disperSiOn unshifted single-mode optical fibre 通信用单模光纤 第3部分：波长段扩展的非色散位移单模光纤特性 |
China National Standards SiO |
English PDF |
| GB/T 9771.1-2020 |
Single-mode optical fibres for telecommunication—Part 1: Characteristics of a disperSiOn unshifted single-mode optical fibre 通信用单模光纤 第1部分：非色散位移单模光纤特性 |
China National Standards SiO |
English PDF |
| GB/T 2900.103-2020 |
Electrotechnical terminology—Generation,transmisSiOn and distribution of electrical energy—Dependability and quality of service of electric power systems 电工术语 发电、输电及配电 电力系统可信性及服务质量 |
China National Standards SiO |
English PDF |
| GB/T 2423.51-2020 |
Environmental testing—Part 2: Test methods—Test Ke: Flowing mixed gas corroSiOn test 环境试验 第2部分：试验方法 试验Ke：流动混合气体腐蚀试验 |
China National Standards SiO |
English PDF |
| GB/T 8704.10-2020 |
Ferrovanadium—Determination of silicon, manganese, phosphorus, aluminum, copper, chromium, nickel and titanium contents— Inductively coupled plasma atomic emisSiOn spectrometric method 钒铁 硅、锰、磷、铝、铜、铬、镍、钛含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 5687.12-2020 |
Ferrochromium—Determination of phosphorus, aluminum, titanium, copper, manganese, calcium content—Inductively coupled plasma atomic emisSiOn spectrometric method 铬铁 磷、铝、钛、铜、锰、钙含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 38744-2020 |
Methods for chemical analysis of synergistic catalysis elements in automotive exhaust catalysis－Determination of cerium, lanthanum, praseodymium, neodymium ,barium and zirconium contents－Inductively coupled plasma atomic emisSiOn spectrometry 机动车尾气净化器中助剂元素化学分析方法 铈、镧、镨、钕、钡、锆含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 11357-2020 |
Quality, roughness and balance of transmisSiOn pulleys 带轮的材质、表面粗糙度及平衡 |
China National Standards SiO |
English PDF |
| GB/T 38762.3-2020 |
Geometrical product specifications (GPS)—DimenSiOnal tolerancing—Part 3: Angular sizes 产品几何技术规范（GPS） 尺寸公差 第3部分：角度尺寸 |
China National Standards SiO |
English PDF |
| GB/T 38762.1-2020 |
Geometrical product specifications (GPS)—DimenSiOnal tolerancing—Part 1: Linear sizes 产品几何技术规范（GPS） 尺寸公差 第1部分：线性尺寸 |
China National Standards SiO |
English PDF |
| GB/T 38762.2-2020 |
Geometrical product specifications (GPS)—DimenSiOnal tolerancing—Part 2: Dimensions other than linear or angular sizes 产品几何技术规范（GPS） 尺寸公差 第2部分：除线性、角度尺寸外的尺寸 |
China National Standards SiO |
English PDF |
| GB/T 38733-2020 |
Office furniture—Office chairs—Methods for the determination of dimenSiOns 办公家具 办公椅 尺寸测量方法 |
China National Standards SiO |
English PDF |
| GB/T 38723-2020 |
Determination of emisSiOn rate of volatile organic compounds from wooden furniture—Concentration history method 木家具中挥发性有机化合物释放速率检测 逐时浓度法 |
China National Standards SiO |
English PDF |
| GB/T 38722-2020 |
Surface active agents—Determination of interfacial tenSiOn—Drawing up liquid films 表面活性剂 界面张力的测定 拉起液膜法 |
China National Standards SiO |
English PDF |
| GB/T 34874.6-2020 |
Geometrical product specifications (GPS)—X-ray three dimenSiOnal size measuring machines—Part 6: Testing method of workpieces 产品几何技术规范（GPS） X射线三维尺寸测量机 第6部分：工件的检测方法 |
China National Standards SiO |
English PDF |
| GB/T 31396.3-2020 |
Machine tools—DimenSiOns and geometric tests for self-centring chucks with two-piece jaws—Part 3:Power-operated chucks with serrated jaws 机床 分离爪自定心卡盘尺寸和几何精度检验 第3部分：梳齿配合型动力卡盘 |
China National Standards SiO |
English PDF |
| GB/T 30428.8-2020 |
Information system for digitized superviSiOn and management of city—Part 8: Register, treatment and closed for supervision cases 数字化城市管理信息系统 第8部分：立案、处置和结案 |
China National Standards SiO |
English PDF |
| GB/T 38791-2020 |
Oral care and cleansing products—Determination of boric acid and borates in toothpastes—Inductively coupled plasma atomic emisSiOn spectrometry 口腔清洁护理用品 牙膏中硼酸和硼酸盐含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards SiO |
English PDF |
| GB/T 38777-2020 |
Technical requirements and methods of measurement for digital terrestrial televiSiOn external receiving module 地面数字电视外接模块式接收终端技术要求和测量方法 |
China National Standards SiO |
English PDF |
| GB/T 28454-2020 |
Information technology－Security techniques－Selection, deployment and operation of intruSiOn detection and prevention systems(IDPS) 信息技术 安全技术 入侵检测和防御系统（IDPS）的选择、部署和操作 |
China National Standards SiO |
English PDF |
| GB/T 4334-2020 |
CorroSiOn of metals and alloys－Test methods for intergranular corrosion of austenitic and ferritic-austenitic (duplex) stainless steels 金属和合金的腐蚀 奥氏体及铁素体-奥氏体（双相）不锈钢晶间腐蚀试验方法 |
China National Standards SiO |
English PDF |
| GB/T 38630-2020 |
Information technology—Real-time positioning—Multi-source fuSiOn positioning data interface 信息技术 实时定位 多源融合定位数据接口 |
China National Standards SiO |
English PDF |
| GB/T 38574-2020 |
General technical requirement for two-dimenSiOnal code of food traceability 食品追溯二维码通用技术要求 |
China National Standards SiO |
English PDF |
| GB/T 38693-2020 |
Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Thermoelectric flame superviSiOn controls 燃气燃烧器和燃烧器具用安全和控制装置 特殊要求 热电式熄火保护装置 |
China National Standards SiO |
English PDF |
| GB/T 26548.4-2020 |
Hand-held portable power tools—Test methods for evaluation of vibration emisSiOn—Part 4:Straight grinders 手持便携式动力工具 振动试验方法 第4部分：直柄式砂轮机 |
China National Standards SiO |
English PDF |
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