China National Standards

China and GB Standards English PDF List


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.
  •  China "and" GB Standards English PDF List:
  • Standard  Code Standard Title Standard Class Order
    GB/T 15914-2021 Monitoring and testing method for energy saving of steam heating equipments
    蒸汽加热设备节能监测方法
    China National Standards
    and

    English PDF
    GB/T 15566.20-2021 Public information guidance systems -- Setting principles and requirements -- Part 20: Urban area
    公共信息导向系统 设置原则与要求 第20部分:城市区域
    China National Standards
    and

    English PDF
    GB/T 14695-2021 Bucket wheel stacker reclaimer -- Type and basic parameters
    臂式斗轮堆取料机 型式和基本参数
    China National Standards
    and

    English PDF
    GB/T 14383-2021 Forged fittings, socket-welding and threaded
    锻制承插焊和螺纹管件
    China National Standards
    and

    English PDF
    GB/T 14352.22-2021 Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 22:Determination of antimony content -- Hydride generation atomic fluorescence spectrometry
    钨矿石、钼矿石化学分析方法 第22部分:锑量的测定 氢化物发生-原子荧光光谱法
    China National Standards
    and

    English PDF
    GB/T 14352.21-2021 Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 21: Determination of arsenic content -- Hydride generation atomic fluorescence spectrometry
    钨矿石、钼矿石化学分析方法 第21部分:砷量的测定 氢化物发生-原子荧光光谱法
    China National Standards
    and

    English PDF
    GB/T 14352.20-2021 Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 20:Determination of niobium,tantalum,zirconium,hafnium and 15 rare earth elements content -- Inductively coupled plasma mass spectrometry
    钨矿石、钼矿石化学分析方法 第20部分:铌、钽、锆、铪及15个稀土元素量的测定 电感耦合等离子体质谱法
    China National Standards
    and

    English PDF
    GB/T 14352.19-2021 Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 19: Determination of bismuth, cadmium, cobalt, copper, iron, lithium, nickel, phosphorus, lead, strontium, vanadium and zinc content -- Inductive-coupled plasma atomic emission spe
    钨矿石、钼矿石化学分析方法 第19部分:铋、镉、钴、铜、铁、锂、镍、磷、铅、锶、钒和锌量的测定 电感耦合等离子体原子发射光谱法
    China National Standards
    and

    English PDF
    GB/T 13174-2021 Determination of detergency and cycle of washing property for laundry detergents
    衣料用洗涤剂去污力及循环洗涤性能的测定
    China National Standards
    and

    English PDF
    GB/T 12818-2021 Rules for inspecting and testing of railway passenger car after completion of construction
    铁路客车组装后的检查与试验规则
    China National Standards
    and

    English PDF
    GB/T 12668.902-2021 Adjustable speed electrical power drive systems—Part 9-2: Ecodesign for power drive systems, motor starters, power electronics and their driven applications—Energy efficiency indicators for power drive systems and motor starters
    调速电气传动系统 第9-2部分:电气传动系统、电机起动器、电力电子设备及其传动应用的生态设计 电气传动系统和电机起动器的能效指标
    China National Standards
    and

    English PDF
    GB/T 12668.901-2021 Adjustable speed electrical power drive systems—Part 9-1: Ecodesign for power drive systems, motor starters, power electronics and their driven applications—General requirements for setting energy efficiency standards for power driven equipment using the
    调速电气传动系统 第9-1部分:电气传动系统、电机起动器、电力电子设备及其传动应用的生态设计 采用扩展产品法(EPA)和半解析模型(SAM)制定电气传动设备能效标准的一般要求
    China National Standards
    and

    English PDF
    GB/T 12237-2021 Steel ball valves for petroleum, petrochemical and allied industries
    石油、石化及相关工业用的钢制球阀
    China National Standards
    and

    English PDF
    GB/T 10006-2021 Plastics—Film and sheeting—Determination of the coefficients of friction
    塑料 薄膜和薄片 摩擦系数的测定
    China National Standards
    and

    English PDF
    GB/T 10001.7-2021 Public information graphical symbols—Part 7: Symbols for office and teaching
    公共信息图形符号 第7部分:办公教学符号
    China National Standards
    and

    English PDF
    GB/T 10001.6-2021 Public information graphical symbols—Part 6: Symbols for medical treatment and health care
    公共信息图形符号 第6部分:医疗保健符号
    China National Standards
    and

    English PDF
    GB/T 10001.3-2021 Public information graphical symbols—Part 3:Symbols for passenger and cargo transport
    公共信息图形符号 第3部分:客运货运符号
    China National Standards
    and

    English PDF
    GB/T 10001.2-2021 Public information graphical symbols—Part 2: Symbols for tourism and entertainment
    公共信息图形符号 第2部分:旅游休闲符号
    China National Standards
    and

    English PDF
    GB/T 7308.2-2021 Plain bearings—Thin-walled half bearings with or without flange—Part 2:Measurement of wall thickness and flange thickness
    滑动轴承 有法兰或无法兰薄壁轴瓦 第2部分:轴瓦壁厚和法兰厚度测量
    China National Standards
    and

    English PDF
    GB/T 7308.1-2021 Plain bearings—Thin-walled half bearings with or without flange—Part 1:Tolerances, design features and methods of test
    滑动轴承 有法兰或无法兰薄壁轴瓦 第1部分:公差、结构要素和检验方法
    China National Standards
    and

    English PDF
    GB/T 5824-2021 Size system of opening for windows and doors in building
    建筑门窗洞口尺寸系列
    China National Standards
    and

    English PDF
    GB/T 5755-2021 Steel cord conveyor belts—Cord-to-coating bond test—Initial test and after thermal treatment
    钢丝绳芯输送带 绳与包覆胶粘合试验 原始状态下和热老化后试验
    China National Standards
    and

    English PDF
    GB/T 5095.2507-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 25-7: Test 25g: Impedance, reflection coefficient, and voltage standing wave ratio (VSWR)
    电子设备用机电元件 基本试验规程及测量方法 第25-7部分:试验25g:阻抗、反射系数和电压驻波比(VSWR)
    China National Standards
    and

    English PDF
    GB/T 5095.2505-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 25-5:Test 25e: Return loss
    电子设备用机电元件 基本试验规程及测量方法 第25-5部分:试验25e:回波损耗
    China National Standards
    and

    English PDF
    GB/T 5095.2504-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 25-4: Test 25d: Propagation delay
    电子设备用机电元件 基本试验规程及测量方法 第25-4部分:试验25d:传输时延
    China National Standards
    and

    English PDF
    GB/T 5095.2503-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 25-3: Test 25c: Rise time degradation
    电子设备用机电元件 基本试验规程及测量方法 第25-3部分:试验25c:上升时间衰减
    China National Standards
    and

    English PDF
    GB/T 5095.2502-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 25-2: Test 25b: Attenuation (insertion loss)
    电子设备用机电元件 基本试验规程及测量方法 第25-2部分:试验25b:衰减(插入损耗)
    China National Standards
    and

    English PDF
    GB/T 5095.2501-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 25-1: Test 25a: Crosstalk ratio
    电子设备用机电元件 基本试验规程及测量方法 第25-1部分:试验25a:串扰比
    China National Standards
    and

    English PDF
    GB/T 5095.2307-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 23-7: Screening and filtering tests—Test 23g: Effective transfer impedance of connectors
    电子设备用机电元件 基本试验规程及测量方法 第23-7部分:屏蔽和滤波试验 试验23g:连接器的有效转移阻抗
    China National Standards
    and

    English PDF
    GB/T 5095.2304-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 23-4: Screening and filtering tests—Test 23d: Transmission line reflections in the time domain
    电子设备用机电元件 基本试验规程及测量方法 第23-4部分:屏蔽和滤波试验 试验23d:时域内传输线的反射
    China National Standards
    and

    English PDF
    GB/T 5095.2303-2021 Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 23-3:Screening and filtering tests—Test 23c:Shielding effectiveness of connectors and accessories—Line injection method
    电子设备用机电元件 基本试验规程及测量方法 第23-3部分:屏蔽和滤波试验 试验23c:连接器和附件的屏蔽效果 线注入法
    China National Standards
    and

    English PDF
    GB/T 4797.9-2021 Classification of environmental conditions—Environmental conditions appearing in nature—Measured shock and vibration data during storage, transportation and in-use
    环境条件分类 自然环境条件 贮存、运输和使用过程中测得的冲击和振动数据
    China National Standards
    and

    English PDF
    GB/T 4490-2021 Conveyor belts with textile carcass—Widths and lengths
    织物芯输送带 宽度和长度
    China National Standards
    and

    English PDF
    GB/T 4022.1-2021 Surface grinding machines with horizontal grinding wheel spindle and reciprocating table—Testing of the accuracy—Part 1:Machines with table surface length of up to 1600 mm
    卧轴矩台平面磨床 精度检验 第1部分:工作台面长度至1600mm的机床
    China National Standards
    and

    English PDF
    GB/T 3792-2021 Information and documentation—Resource description
    信息与文献 资源描述
    China National Standards
    and

    English PDF
    GB/T 3684-2021 Conveyor belts—Electrical conductivity—Specification and test method
    输送带 导电性 规范和试验方法
    China National Standards
    and

    English PDF
    GB/T 3480.2-2021 Calculation of load capacity of spur and helical gears—Part 2: Calculation of surface durability (pitting)
    直齿轮和斜齿轮承载能力计算 第2部分:齿面接触强度(点蚀)计算
    China National Standards
    and

    English PDF
    GB/T 2889.5-2021 Plain bearings—Terms, definitions, classification and symbols—Part 5:Application of symbols
    滑动轴承 术语、定义、分类和符号 第5部分:符号的应用
    China National Standards
    and

    English PDF
    GB/T 2680-2021 Glass in building—Determination of light transmittance, solar direct transmittance, total solar energy transmittance, ultraviolet transmittance and related glazing factors
    建筑玻璃 可见光透射比、太阳光直接透射比、太阳能总透射比、紫外线透射比及有关窗玻璃参数的测定
    China National Standards
    and

    English PDF
    GB/T 1454-2021 Test method for edgewise compressive properties of sandwich constructions
    夹层结构侧压性能试验方法
    China National Standards
    and

    English PDF
    GB/T 1406.3-2021 Types and dimensions of lamp caps—Part 3:Prefocus caps
    灯头的型式和尺寸 第3部分:预聚焦式灯头
    China National Standards
    and

    English PDF
    GB/T 41021-2021 Forensic sciences -- Content and format of DNA identification report
    法庭科学? DNA鉴定文书内容及格式
    China National Standards
    and

    English PDF
    GB/T 14914.6-2021 The specification for marine observation—Part 6:Data processing and quality control of marine observational data
    海洋观测规范 第6部分:数据处理与质量控制
    China National Standards
    and

    English PDF
    GB/T 14914.3-2021 The specification for marine observation -- Part 3: Surface and subsurface buoy-based observation
    海洋观测规范 第 3 部分:浮标潜标观测
    China National Standards
    and

    English PDF
    GB/T 9254.1-2021 Information technology equipment, multimedia equipment and receivers -- Electromagnetic compatibility -- Part 1: Emission requirements
    信息技术设备、多媒体设备和接收机 电磁兼容 第1部分:发射要求
    China National Standards
    and

    English PDF
    GB/T 34273-2021 Standard test method for calculated cetane index of coal liquefaction diesel—Four variable equetion
    煤液化柴油十六烷指数计算法 四变量公式法
    China National Standards
    and

    English PDF
    GB/T 8563.3-2021 Classification and codes for information of reward and disciplinary action -- Part 3: Codes of disciplinary action and organizational punishment
    奖励、纪律处分信息分类与代码? 第3部分:纪律处分和组织处理代码
    China National Standards
    and

    English PDF
    GB/T 41205.1-2021 Code and attribute description of emergency supplies -- Part 1: Personal protective equipment
    应急物资编码与属性描述 第1部分:个体防护装备
    China National Standards
    and

    English PDF
    GB/T 41205.2-2021 Code and attribute description of emergency supplies -- Part 2: Decontamination material and equipment
    应急物资编码与属性描述 第2部分:洗消器材及设备
    China National Standards
    and

    English PDF
    GB/T 41205.3-2021 Code and attribute description of emergency supplies -- Part 3: Search and rescue equipment
    应急物资编码与属性描述 第3部分:搜救设备
    China National Standards
    and

    English PDF
    GB/T 41074-2021 Microbeam analysis -- Method of specimen preparation for analysis of general powders using WDS and EDS
    微束分析 用于波谱和能谱分析的粉末试样制备方法
    China National Standards
    and

    English PDF
    GB/T 15579.14-2021 Arc welding equipment -- Part 14: Calibration, validation and consistency testing
    弧焊设备 第14部分:校准、确认和一致性试验
    China National Standards
    and

    English PDF
    GB/T 21419-2021 Transformers, power supplies, reactors and similar products—EMC requirements
    变压器、电源装置、电抗器及其类似产品 电磁兼容(EMC)要求
    China National Standards
    and

    English PDF
    GB/T 41042-2021 Guidance for utilization and classification of content of valuable elements in coal
    煤中有价元素含量分级及应用导则
    China National Standards
    and

    English PDF
    GB/T 41043-2021 Coordinative development effectiveness evaluation indicator and method of coal and coalbed methane
    煤与煤层气协调开发效果评价指标及计算方法
    China National Standards
    and

    English PDF
    GB/T 3099.4-2021 Terminology of fasteners—Control, inspection, delivery, acceptance and quality
    紧固件术语 控制、检查、交付、接收和质量
    China National Standards
    and

    English PDF
    GB/T 20303.5-2021 Cranes—Cabins and control stations—Part 5: Overhead travelling and portal bridge cranes
    起重机 司机室和控制站 第5 部分:桥式和门式起重机
    China National Standards
    and

    English PDF
    GB/T 17743-2021 Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment
    电气照明和类似设备的无线电骚扰特性的限值和测量方法
    China National Standards
    and

    English PDF
    GB/T 4657-2021 Codes for the central party and state organs people’s communities and the other state organizations
    中央党政机关、人民团体及其他机构代码
    China National Standards
    and

    English PDF
    GB/T 8563.1-2021 Classification and codes for information of reward and disciplinary action -- Part 1: Codes of medal, honorary title and reward
    奖励、纪律处分信息分类与代码 第1部分:勋章、荣誉称号和表彰奖励代码
    China National Standards
    and

    English PDF
    GB/T 30887-2021 Technical guide for water system integration and optimization of industrial enterprises
    工业企业水系统集成优化技术指南
    China National Standards
    and

    English PDF
    GB/T 41249-2021 Industrial assistance—Guidance for operation management of “pig-biogas-fruit (grain and vegetable)”circular agricultural project
    产业帮扶 “猪-沼-果(粮、菜)” 循环农业项目运营管理指南
    China National Standards
    and

    English PDF
    GB/T 21938-2021 Earth-moving machinery─Hydraulic excavator and backhoe loader lowering control device─Requirements and tests
    土方机械 液压挖掘机和挖掘装载机下降控制装置 要求和试验
    China National Standards
    and

    English PDF
    GB/T 22565.1-2021 Metallic materials -- Sheet and strip -- Method for spring back evaluation -- Part 1: Stretch bending
    金属材料 薄板和薄带 回弹性能评估方法 第1部分:拉弯法
    China National Standards
    and

    English PDF
    GB/T 5121.28-2021 Methods for chemical analysis of copper and copper alloys—Part 28:Determination of chromium,iron,manganese,cobalt,nickel,zinc,arsenic,selenium,silver,cadmium,tin,antimony,tellurium,lead and bismuth content—Inductively coupled plasma-mass spectrometry
    铜及铜合金化学分析方法 第28部分:铬、铁、锰、钴、镍、锌、砷、硒、银、镉、锡、锑、碲、铅和铋含量的测定 电感耦合等离子体质谱法
    China National Standards
    and

    English PDF
    GB/T 7991.1-2021 Test method of viterous and porcelain enamels—Part 1:Determination of resistance to alkaline liquids
    搪玻璃层试验方法 第1部分:耐碱性溶液腐蚀性能的测定
    China National Standards
    and

    English PDF
    GB/T 6113.104-2021 Specification for radio disturbance and immunity measuring apparatus and methods—Part 1-4:Radio disturbance and immunity measuring apparatus—Antennas and test sites for radiated disturbance measurements
    无线电骚扰和抗扰度测量设备和测量方法规范 第1-4部分:无线电骚扰和抗扰度测量设备 辐射骚扰测量用天线和试验场地
    China National Standards
    and

    English PDF
    GB/T 6113.101-2021 Specification for radio disturbance and immunity measuring apparatus and methods—Part 1-1: Radio disturbance and immunity measuring apparatus—Measuring apparatus
    无线电骚扰和抗扰度测量设备和测量方法规范 第1-1部分:无线电骚扰和抗扰度测量设备 测量设备
    China National Standards
    and

    English PDF
    GB/T 41039-2021 The general rules of determing designed coal and checked coal in modern coal chemical technology
    现代煤化工项目设计煤种和校核煤种确定通则
    China National Standards
    and

    English PDF
    GB/T 14598.118-2021 Measuring relays and protection equipment -- Part 118: Synchrophasor for power systems -- Measurements
    量度继电器和保护装置 第118部分:电力系统同步相量 测量
    China National Standards
    and

    English PDF
    GB/T 41164-2021 Specifications technology for multistage fracturing in horizontal well within roof of broken-soft and low permeability coal seam
    碎软低渗煤层顶板水平井分段压裂技术规范
    China National Standards
    and

    English PDF
    GB/T 41138-2021 Product quality information system -- Information classification, sharing and exchange
    产品质量信息系统 信息分类与共享交换
    China National Standards
    and

    English PDF
    GB/T 10892-2021 Stationary air compressors -- Safety rules and code of practice
    固定的空气压缩机 安全规则和操作规程
    China National Standards
    and

    English PDF
    GB/T 41108.3-2021 Safety of machinery -- Safety requirements for interlocking devices -- Part 3: Trapped key interlocking devices and systems
    机械安全 联锁装置的安全要求 第3部分:截留钥匙联锁装置及系统
    China National Standards
    and

    English PDF
    GB/T 14598.181-2021 Measuring relays and protection equipment -- Part 181:Functional requirements for frequency protection
    量度继电器和保护装置 第181 部分:频率保护功能要求
    China National Standards
    and

    English PDF
    GB/T 26281-2021 Methods for the calculation of heat balance,heat efficiency and comprehensive energy consumption of cement rotary kiln
    水泥回转窑热平衡、热效率、综合能耗计算方法
    China National Standards
    and

    English PDF
    GB/T 3670-2021 Covered electordes for manual metal arc welding of copper and copper alloys
    铜及铜合金焊条
    China National Standards
    and

    English PDF
    GB/T 41111-2021 Rods for gas welding of non-alloy and creep-resisting steels
    气焊用非合金钢及热强钢填充丝
    China National Standards
    and

    English PDF
    GB/T 41110-2021 Tubular cored electrodes for gas shielded and non-gas shielded metal arc welding of nickel and nickel alloys
    镍及镍合金药芯焊丝
    China National Standards
    and

    English PDF
    GB/T 41112-2021 Solid wire electrodes, solid wires and rods for fusion welding of magnesium and magnesium alloys
    镁及镁合金焊丝
    China National Standards
    and

    English PDF
    GB/T 26465-2021 Safety rules for the construction and installation of firefighters lifts
    消防员电梯制造与安装安全规范
    China National Standards
    and

    English PDF
    GB/T 41123.2-2021 Non-destructive testing—Radiation methods for industrial computed tomography—Part 2:Operation and interpretation
    无损检测 工业射线计算机层析成像检测 第2部分:操作和解释
    China National Standards
    and

    English PDF
    GB/T 41123.1-2021 Non-destructive testing -- Radiation methods for industrial computed tomography -- Part 1: Principles, equipment and samples
    无损检测 工业射线计算机层析成像检测 第1部分:原理、设备和样品
    China National Standards
    and

    English PDF
    GB/T 41105.3-2021 Non-destructive testing -- Measurement and evaluation of the X-ray tube voltage -- Part 3: Spectrometric method
    无损检测? X射线管电压的测量和评价 第3部分:能谱法
    China National Standards
    and

    English PDF
    GB/T 41105.2-2021 Non-destructive testing -- Measurement and evaluation of the X-ray tube voltage -- Part 2: Constancy check by the thick filter method
    无损检测? X射线管电压的测量和评价 第2部分:厚板滤波法稳定性核查
    China National Standards
    and

    English PDF
    GB/T 15829-2021 Soft soldering flux -- Classification and requirements
    软钎剂 分类与性能要求
    China National Standards
    and

    English PDF
    GB/T 41113-2021 Qualification testing of brazers and brazing operators
    硬钎焊工和硬钎焊操作工技能评定
    China National Standards
    and

    English PDF
    GB/T 41104.3-2021 Solder wire, solid and flux cored -- Specifications and test methods -- Part 3: Wetting balance test method for flux cored solder wire efficacy
    实心和药芯软钎料丝? 规范和试验方法? 第3部分:药芯软钎料丝功效的润湿平衡试验方法
    China National Standards
    and

    English PDF
    GB/T 41104.2-2021 Solder wire, solid and flux cored -- Specification and test methods -- Part 2: Determination of flux content
    实心和药芯软钎料丝? 规范和试验方法? 第2部分:钎剂含量的测定
    China National Standards
    and

    English PDF
    GB/T 41104.1-2021 Solder wire, solid and flux cored -- Specification and test methods -- Part 1: Classification and performance requirements
    实心和药芯软钎料丝? 规范和试验方法? 第1部分:分类和性能要求
    China National Standards
    and

    English PDF
    GB/T 22437.5-2021 Cranes—Design principles for loads and load combinations—Part 5:Overhead travelling and portal bridge cranes
    起重机 载荷与载荷组合的设计原则 第5部分:桥式和门式起重机
    China National Standards
    and

    English PDF
    GB/T 41105.1-2021 Non-destructive testing—Measurement and evaluation of the X-ray tube voltage—Part 1:Voltage divider method
    无损检测 X射线管电压的测量和评价 第1部分:分压法
    China National Standards
    and

    English PDF
    GB/T 8593.2-2021 Earth-moving machinery—Symbols for operator controls and other displays—Part 2:Symbols for specific machines,equipment and accessories
    土方机械 司机操纵装置和其他显示装置用符号 第2部分:机器、工作装置和附件的特殊符号
    China National Standards
    and

    English PDF
    GB/T 8593.1-2021 Earth-moving machinery -- Symbols for operator controls and other displays -- Part 1: Common symbols
    土方机械? 司机操纵装置和其他显示装置用符号? 第1部分:通用符号
    China National Standards
    and

    English PDF
    GB/T 29004-2021 Rice transplanter -- Evaluation index and measurement methods for fuel consumption
    水稻插秧机 燃油消耗量指标及测量方法
    China National Standards
    and

    English PDF
    GB/T 24818.2-2021 Cranes—Access, guards and restraints—Part 2: Mobile cranes
    起重机 通道及安全防护设施 第2部分:流动式起重机
    China National Standards
    and

    English PDF
    GB/T 20303.2-2021 Cranes—Cabins and control stations—Part 2:Mobile cranes
    起重机 司机室和控制站 第2部分:流动式起重机
    China National Standards
    and

    English PDF
    GB/T 8100.3-2021 Mounting surfaces of hydraulic valves—Part 3: Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves
    液压阀安装面 第3部分:减压阀、顺序阀、卸荷阀、节流阀和单向阀
    China National Standards
    and

    English PDF
    GB/T 41176-2021 Professional sportswear -- Ski and snowboard wear
    专业运动服装? 滑雪服
    China National Standards
    and

    English PDF
    GB/T 24604-2021 Rolling bearings-Angular contact thrust ball bearings and units for machine tool screws
    滚动轴承 机床丝杠用推力角接触球轴承及单元
    China National Standards
    and

    English PDF

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