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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 18134.1-2000 |
High-voltage testing techniques with very fast impulses--Part 1:MeasuRing systems for very fast front overvoltages generated in gas-insulated substations 极快速冲击高电压试验技术 第1部分:气体绝缘变电站中陡波前过电压用测量系统 |
China National Standards Ring |
 English PDF |
| GB/T 18117-2000 |
Photography--Processed photographic colour films and paper prints--Methods for measuRing imagestability 照相 已加工照相彩色胶片和相纸照片 影像稳定性试验方法 |
China National Standards Ring |
English PDF |
| GB/T 1859-2000 |
Reciprocating internal combustion engines--Measurement of emitted airborne noise--EngineeRing method and survey method 往复式内燃机 辐射的空气噪声测量 工程法及简易法 |
China National Standards Ring |
English PDF |
| GB/T 18022-2000 |
Acoustics--Methods for measuRing the longitudinal sound speed and attenuation coefficient of rubbers and plastics in the frequency range 1 MHz to 10 MHz 声学 1～10 MHz频率范围内橡胶和塑料纵波声速与衰减系数的测量方法 |
China National Standards Ring |
English PDF |
| GB/T 17247.1-2000 |
Acoustics--Attenuation of sound duRing propagation outdoors--Part 1:Calculation of the absorption of sound by the atmosphere 声学 户外声传播衰减 第1部分:大气声吸收的计算 |
China National Standards Ring |
English PDF |
| GB/T 18025-2000 |
Agricultural irrigation--WiRing and equipment for electrically driven or controlled irrigation machines 农业灌溉设备 电动或电控灌溉机械的电气设备和布线 |
China National Standards Ring |
English PDF |
| GB/T 17949.1-2000 |
Guide for measuRing earth resistivity，ground impedance and earth surface potentials of a ground system--Part 1:Normal measurements 接地系统的土壤电阻率、接地阻抗和地面电位测量导则 第1部分:常规测量 |
China National Standards Ring |
English PDF |
| GB/T 16678.5-2000 |
Information technology--Fibre Distributed Data Interface (FDDI)--Part 5:Hybrid Ring Control(HRC) 信息技术 光纤分布式数据接口(FDDI) 第5部分:混合环控制(HRC) |
China National Standards Ring |
English PDF |
| GB/T 11287-2000 |
Electrical relays--Part 21:Vibration，shock，bump and seismic tests on measuRing relays and protection equipment--Section one:Vibration tests(sinusoidal) 电气继电器 第21部分:量度继电器和保护装置的振动、冲击、碰撞和地震试验 第1篇:振动试验(正弦) |
China National Standards Ring |
English PDF |
| GB/T 17923-1999 |
Analysis method for oil-beaRing waste water from marine petroleum development industry 海洋石油开发工业含油污水分析方法 |
China National Standards Ring |
English PDF |
| GB/T 4270-1999 |
Graphical symbols and letter codes for thermal engineeRing in the technical documentation 技术文件用热工图形符号与文字代号 |
China National Standards Ring |
English PDF |
| GB/T 17996-1999 |
Code for product quality inspection for pig in slaughteRing 生猪屠宰产品品质检验规程 |
China National Standards Ring |
English PDF |
| GB/T 17865-1999 |
Specification for measuRing depth of focus and best focus 焦深与最佳聚焦的测量规范 |
China National Standards Ring |
English PDF |
| GB/T 17860.2-1999 |
Electrical measuRing instruments--X-t recorders--Part 2:Recommended additional test methods 电测量仪器 X-t记录仪 第2部分:推荐的附加试验方法 |
China National Standards Ring |
English PDF |
| GB/T 17860.1-1999 |
Electrical measuRing instruments--X-t recorders--Part 1:Definitions and requirements 电测量仪器 X-t记录仪 第1部分:定义和要求 |
China National Standards Ring |
English PDF |
| GB/T 273.3-1999 |
Rolling beaRings--Radial bearings--Boundary dimensions，general plan 滚动轴承 向心轴承 外形尺寸总方案 |
China National Standards Ring |
English PDF |
| GB/T 17844-1999 |
Small craft--Remote steeRing systems 小艇 遥控操舵系统 |
China National Standards Ring |
English PDF |
| GB/T 7584.2-1999 |
Acoustics--HeaRing protectors--Part 2:Estimation of effective A-weighted sound pressure levels when hearing protectors are worn 声学 护听器 第2部分:戴护听器时有效的A计权声压级估算 |
China National Standards Ring |
English PDF |
| GB/T 5003-1999 |
Checking and measuRing to the chemical corroding resistance of glazes of domestic ceramics 日用陶瓷器釉面耐化学腐蚀性的测定 |
China National Standards Ring |
English PDF |
| GB/T 3334-1999 |
Method of test for dissipation factor (tgδ) of cable paper at power frequence (ScheRing bridge method) 电缆纸介质损耗角正切(tgδ)试验方法(电桥法) |
China National Standards Ring |
English PDF |
| GB/T 17825.3-1999 |
Management of CAD documents--NumbeRing principles CAD文件管理 编号原则 |
China National Standards Ring |
English PDF |
| GB/T 11327.1-1999 |
Low-frequency telecommunication cables and wires with PVC insulation and PVC sheath--Part 1:General test and measuRing methods 聚氯乙烯绝缘聚氯乙烯护套低频通信电缆电线 第1部分:一般试验和测量方法 |
China National Standards Ring |
English PDF |
| GB 50299-1999 |
Code for construction and acceptance of metro engineeRing 地下铁道工程施工及验收规范 |
China National Standards Ring |
English PDF |
| GB/T 50283-1999 |
Unified standard of reliability design of highway engineeRing structures 公路工程结构可靠度设计统一标准 |
China National Standards Ring |
English PDF |
| GB/T 17248.5-1999 |
Acoustics--Noise emitted by machinery and equipment--Measurement of emission sound pressure levels at a work station and at other specified positions--Method requiRing environmental corrections 声学 机器和设备发射的噪声 工作位置和其他指定位置发射声压级的测量 环境修正法 |
China National Standards Ring |
English PDF |
| GB/T 17248.2-1999 |
Acoustics--Noise emitted by machinery and equipment--Measurement of emission sound pressure levels at a work station and at otherspecified positions--EngineeRing method in an essentially free field over a reflecting plane 声学 机器和设备发射的噪声 工作位置和其他指定位置发射声压级的测量 一个反射面上方近似自由场的工程法 |
China National Standards Ring |
English PDF |
| GB 17681-1999 |
Technical requirements of acceptance for safety monitoRing，controlling and early warning system of inflammable and explosive tank farm 易燃易爆罐区安全监控预警系统验收技术要求 |
China National Standards Ring |
English PDF |
| GB 17675-1999 |
SteeRing system of motor vehicles--Basic requirements 汽车转向系 基本要求 |
China National Standards Ring |
English PDF |
| GB/T 17660-1999 |
Method for determination of the buffeRing capacity of wood 木材缓冲容量测定方法 |
China National Standards Ring |
English PDF |
| GB/T 17650.2-1998 |
Test on gases evolved duRing combustion of materials from cables--Part 2:Determination of degree of acidity of gases by measuring pH and conductivity 取自电缆或光缆的材料燃烧时释出气体的试验方法 第2部分:用测量pH值和电导率来测定气体的酸度 |
China National Standards Ring |
English PDF |
| GB/T 17650.1-1998 |
Test on gases evolved duRing combustion of materials from cables--Part 1:Determination of the amount of halogen acid gas 取自电缆或光缆的材料燃烧时释出气体的试验方法 第1部分:卤酸气体总量的测定 |
China National Standards Ring |
English PDF |
| GB/T 17627.2-1998 |
High-voltage test techniques for low voltage equipment--Part 2:MeasuRing system and test equipment 低压电气设备的高电压试验技术 第二部分:测量系统和试验设备 |
China National Standards Ring |
English PDF |
| GB/T 17604-1998 |
Rubber--Recommendations for the workmanship of pipe joint Rings--Description and classification of imperfections 橡胶 管道接口用密封圈制造质量的建议 疵点分类与类别 |
China National Standards Ring |
English PDF |
| GB/T 15970.5-1998 |
Corrosion of metals and alloys--Stress corrosion testing--Part 5:Preparation and useof C-Ring specimens 金属和合金的腐蚀 应力腐蚀试验 第5部分:C型环试样的制备和应用 |
China National Standards Ring |
English PDF |
| GB/T 8430-1998 |
Textiles--Tests for colour fastness--Colour fastness to artificial weatheRing:Xenon arc fading lamp test 纺织品 色牢度试验 耐人造气候色牢度:氙弧 |
China National Standards Ring |
English PDF |
| GB/T 8429-1998 |
Textiles--Tests for colour fastness--Colour fastness to weatheRing:Outdoor exposure 纺织品 色牢度试验 耐气候色牢度:室外曝晒 |
China National Standards Ring |
English PDF |
| GB/T 17596-1998 |
Textiles--Commercial laundeRing procedure for textile fabrics prior to flammability testing 纺织品 织物燃烧试验前的商业洗涤程序 |
China National Standards Ring |
English PDF |
| GB/T 17595-1998 |
Textiles--Domestic laundeRing procedures for textile fabrics prior to flammability testing 纺织品 织物燃烧试验前的家庭洗涤程序 |
China National Standards Ring |
English PDF |
| GB/T 8554-1998 |
Transformers and inductors for use in electronic and telecommunication equipment--MeasuRing methodsand test procedures 电子和通信设备用变压器和电感器 测量方法及试验程序 |
China National Standards Ring |
English PDF |
| GB/T 7397.3-1998 |
MeasuRing methods for non-broadcast video tape recorders--Part 3:Audio characteristics for FMrecording 非广播磁带录像机测量方法 第3部分:FM记录的音频特性 |
China National Standards Ring |
English PDF |
| GB/T 16720.4-1998 |
Industrial automation systems--ManufactuRing message specification--Part 4:Companion standardfor numerical control 工业自动化系统 制造报文规范 第4部分:数值控制用伴同标准 |
China National Standards Ring |
English PDF |
| GB/T 2837-1998 |
MeasuRing method for size and deviation of vitrified clay pipe 陶管尺寸及偏差测量方法 |
China National Standards Ring |
English PDF |
| GB 17501-1998 |
Specification for marine engineeRing topographicsurveying 海洋工程地形测量规范 |
China National Standards Ring |
English PDF |
| GB/T 17496-1998 |
RepaiRing technique rules for the harbour portal crane 港口门座起重机修理技术规范 |
China National Standards Ring |
English PDF |
| GB/T 17471-1998 |
Principles for providing of monitoRing and measuring instruments of energy in boiler heating network system 锅炉热网系统能源监测与计量仪表配备原则 |
China National Standards Ring |
English PDF |
| GB/T 4459.7-1998 |
Mechanical drawings--Representation of rolling beaRings 机械制图 滚动轴承表示法 |
China National Standards Ring |
English PDF |
| GB/T 305-1998 |
Rolling beaRings--Snap ring groove and snap ring on outer ring--Dimensions and tolerances 滚动轴承 外圈上的止动槽和止动环 尺寸和公差 |
China National Standards Ring |
English PDF |
| GB/T 290-1998 |
Rolling beaRings--Needle roller bearings，drawn cup without inner rings--Boundary dimensions 滚动轴承 冲压外圈滚针轴承 外形尺寸 |
China National Standards Ring |
English PDF |
| GB/T 7676.9-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 9:Recom-mended test methods 直接作用模拟指示电测量仪表及其附件 第9部分:推荐的试验方法 |
China National Standards Ring |
English PDF |
| GB/T 7676.8-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 8:Special requirements for accessories 直接作用模拟指示电测量仪表及其附件 第8部分:附件的特殊要求 |
China National Standards Ring |
English PDF |
| GB/T 7676.7-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 7:Special requirements for multi-function instruments 直接作用模拟指示电测量仪表及其附件 第7部分:多功能仪表的特殊要求 |
China National Standards Ring |
English PDF |
| GB/T 7676.6-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 6:Special requirements for ohmmeters(impedance meters) and conductance meters 直接作用模拟指示电测量仪表及其附件 第6部分:电阻表(阻抗表)和电导表的特殊要求 |
China National Standards Ring |
English PDF |
| GB/T 7676.5-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 5:Special requirements for phase meters，power factor meters and synchroscopes 直接作用模拟指示电测量仪表及其附件 第5部分:相位表、功率因数表和同步指示器的特殊要求 |
China National Standards Ring |
English PDF |
| GB/T 7676.4-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 4:Special requirements for frequency meters 直接作用模拟指示电测量仪表及其附件 第4部分:频率表的特殊要求 |
China National Standards Ring |
English PDF |
| GB/T 7676.3-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 3:Special requirements for wattmeters and varmeters 直接作用模拟指示电测量仪表及其附件 第3部分:功率表和无功率表的特殊要求 |
China National Standards Ring |
English PDF |
| GB/T 7676.2-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 2:Special requirements for ammeters and voltmeters 直接作用模拟指示电测量仪表及其附件 第2部分:电流表和电压表的特殊要求 |
China National Standards Ring |
English PDF |
| GB/T 7676.1-1998 |
Direct acting indicating analogue electrical measuRing instruments and their accessories--Part 1:Definition and general requirements common to all parts 直接作用模拟指示电测量仪表及其附件 第1部分:定义和通用要求 |
China National Standards Ring |
English PDF |
| GB/T 13850-1998 |
Electrical measuRing transducers for converting a.c. electrical quantities to analogue or digital singals 交流电量转换为模拟量或数字信号的电测量变送器 |
China National Standards Ring |
English PDF |
| GB 17404-1998 |
Good manufactuRing practice for puffed food 膨化食品良好生产规范 |
China National Standards Ring |
English PDF |
| GB/T 17287-1998 |
Liquid hydrocarbons--Dynamic measurement--Statistical control of volumetric meteRing systems 液态烃动态测量 体积计量系统的统计控制 |
China National Standards Ring |
English PDF |
| GB/T 17247.2-1998 |
Acoustics--Attenuation ofsound duRing propagation outdoors--Part 2:General method of calculation 声学 户外声传播的衰减 第2部分:一般计算方法 |
China National Standards Ring |
English PDF |
| GB/T 5095.9-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 9:Miscellaneous tests 电子设备用机电元件 基本试验规程及测量方法 第9部分:杂项试验 |
China National Standards Ring |
English PDF |
| GB/T 5095.8-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 8:Connector tests(mechanical)and mechanical tests on contacts and terminations 电子设备用机电元件 基本试验规程及测量方法 第8部分:连接器、接触件及引出端的机械试验 |
China National Standards Ring |
English PDF |
| GB/T 5095.7-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 7:Mechanical operating tests and sealing tests 电子设备用机电元件 基本试验规程及测量方法 第7部分:机械操作试验和密封性试验 |
China National Standards Ring |
English PDF |
| GB/T 5095.6-1997 |
Electromechanical components for electronic equipment--Basic testing proceduresand measuRing methods--Part 6:Climatic tests and soldering tests 电子设备用机电元件 基本试验规程及测量方法 第6部分:气候试验和锡焊试验 |
China National Standards Ring |
English PDF |
| GB/T 5095.5-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 5:Impact tests(free components)，static load tests(fixed components)，endurance tests and overload tests 电子设备用机电元件 基本试验规程及测量方法 第5部分:撞击试验(自由元件)、静负荷试验(固定元件)、寿命试验和过负荷试验 |
China National Standards Ring |
English PDF |
| GB/T 5095.4-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 4:Dynamic stress tests 电子设备用机电元件 基本试验规程及测量方法 第4部分:动态应力试验 |
China National Standards Ring |
English PDF |
| GB/T 5095.3-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 3:Current-carrying capacity tests 电子设备用机电元件 基本试验规程及测量方法 第3部分:载流容量试验 |
China National Standards Ring |
English PDF |
| GB/T 5095.2-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 2:Generalexamination，electrical continuity and contact resistance tests，insulationtests and voltage stress tests 电子设备用机电元件 基本试验规程及测量方法 第2部分:一般检查、电连续性和接触电阻测试、绝缘试验和电压应力试验 |
China National Standards Ring |
English PDF |
| GB/T 5095.15-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 15:Mechanical tests on contacts and terminations--Section 8:Test 15h--Contact retention system resistance to tool application 电子设备用机电元件 基本试验规程及测量方法 第15部分:接触件和引出端的机械试验 第八篇:试验15h接触件固定机构耐工具使用性 |
China National Standards Ring |
English PDF |
| GB/T 5095.12-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 12:Soldering tests--Section 6:Test 12f--Sealing against flux and cleaning solvents inmachine soldering 电子设备用机电元件 基本试验规程及测量方法 第12部分:锡焊试验 第六篇:试验12f在机器焊接中封焊处耐焊剂和清洁剂 |
China National Standards Ring |
English PDF |
| GB/T 5095.1-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRingmethods--Part 1:General 电子设备用机电元件 基本试验规程及测量方法 第1部分:总则 |
China National Standards Ring |
English PDF |
| GB/T 5095.11-1997 |
Electromechanical components for electronic equipment--Basic testing procedures and measuRing methods--Part 11:Climatic tests 电子设备用机电元件 基本试验规程及测量方法 第11部分:气候试验 |
China National Standards Ring |
English PDF |
| GB/T 17150-1997 |
Radiological protection monitoRing procedure--Part 1:Industrial X-ray detection 放射卫生防护监测规范 第1部分:工业X射线探伤 |
China National Standards Ring |
English PDF |
| GB/T 14006.2-1997 |
Outline dimemsions of transformers and inductors for use in telecommunication and electronic equipmemt--Part 2:Transformers and inductors using YEx-2 laminations for printed wiRing boardmounting 通信和电子设备用变压器和电感器外形尺寸 第2部分:采用YEx-2系列铁心片印制板安装式变压器和电感器 |
China National Standards Ring |
English PDF |
| GB/T 16925-1997 |
Test method for abrasion resistance of concrete and its products(Ball beaRing method) 混凝土及其制品耐磨性试验方法 (滚珠轴承法) |
China National Standards Ring |
English PDF |
| GB/T 12726.5-1997 |
Radiation monitoRing equipment for accident and post-accident conditions in nuclear power plants--Part 5:Monitoring equipment for air radioactivity 核电厂事故及事故后辐射监测设备 第五部分:空气放射性监测设备 |
China National Standards Ring |
English PDF |
| GB/T 3819-1997 |
Textiles--Determination of the recovery from creasing of a folded specimen by measuRing the angle of recovery 纺织品 织物折痕回复性的测定 回复角法 |
China National Standards Ring |
English PDF |
| GB/T 16848-1997 |
Accuracy of double enveloping worm geaRing withstraight line generatrix 直廓环面蜗杆、蜗轮精度 |
China National Standards Ring |
English PDF |
| GB/T 1550-1997 |
Standard methods for measuRing conductivity type of extrinsic semiconducting materials 非本征半导体材料导电类型测试方法 |
China National Standards Ring |
English PDF |
| GB/T 16823.1-1997 |
Stress area and beaRing area for threaded fasteners 螺纹紧固件应力截面积和承载面积 |
China National Standards Ring |
English PDF |
| GB/T 16760-1997 |
Preparation of standard methods of measuRing performance (SMMP) of consumer goods 制定消费品性能测试标准方法的总则 |
China National Standards Ring |
English PDF |
| GB/T 16748-1997 |
Plain beaRings--Compression testing of metallic bearing materials 滑动轴承 金属轴承材料的压缩试验 |
China National Standards Ring |
English PDF |
| GB/T 16720.3-1996 |
Industrial automation systems--ManufactuRing message specification(MMS)--Part 3:Companion standard for robotics 工业自动化系统 制造报文规范 第3部分:机器人伴同标准 |
China National Standards Ring |
English PDF |
| GB/T 16667-1996 |
MonitoRing and testing method for energy saving of electrical welding installation 电焊设备节能监测方法 |
China National Standards Ring |
English PDF |
| GB/T 16665-1996 |
MonitoRing and testing method for energy saving of air compressor unit and air distribution system 空气压缩机组及供气系统节能监测方法 |
China National Standards Ring |
English PDF |
| GB/T 16664-1996 |
MonitoRing and testing method for energy saving of power supply distribution system of industrial enterprise 企业供配电系统节能监测方法 |
China National Standards Ring |
English PDF |
| GB/T 16678.2-1996 |
Information processing systems--Fibre distributed data lnterface (FDDI)--Part 2:Token Ring media access control (MAC) 信息处理系统 光纤分布式数据接口(FDDI) 第2部分:令牌环媒体访问控制(MAC) |
China National Standards Ring |
English PDF |
| GB/T 16678.1-1996 |
Information processing systems--Fibre distributed data interface (FDDI)--Part 1:Token Ring physical layer protocol (PHY) 信息处理系统 光纤分布式数据接口(FDDI) 第1部分:令牌环物理层协议(PHY) |
China National Standards Ring |
English PDF |
| GB/T 16643-1996 |
Rolling beaRings--Combined needle roller thrust roller bearings--Boundary dimensions 滚动轴承 滚针和推力圆柱滚子组合轴承 外形尺寸 |
China National Standards Ring |
English PDF |
| GB/T 15629.5-1996 |
Information technology--Local and metropolitan area networks--Part 5:Token Ring access method and physical layer specifications 信息技术 局域网和城域网 第5部分:令牌环访问方法和物理层规范 |
China National Standards Ring |
English PDF |
| GB/T 9276-1996 |
Methods of exposure to natural weatheRing of coating 涂层自然气候曝露试验方法 |
China National Standards Ring |
English PDF |
| GB/T 16585-1996 |
Rubber，vulcanized--Test method of resistance to artificial weatheRing (Fluorescent UV lamp) 硫化橡胶人工气候老化(荧光紫外灯)试验方法 |
China National Standards Ring |
English PDF |
| GB/T 16530-1996 |
MeasuRing method for polarization dependence of return loss of a single-mode fibre optic component 单模纤维光学器件回波损耗偏振依赖性测量方法 |
China National Standards Ring |
English PDF |
| GB/T 16526-1996 |
Test method of measuRing the lead-to-lead and loading capacitance of package leads 封装引线间电容和引线负载电容测试方法 |
China National Standards Ring |
English PDF |
| GB/T 16511-1996 |
Electrical and electronic measuRing equipment--Documentation 电气和电子测量设备随机文件 |
China National Standards Ring |
English PDF |
| GB/T 6798-1996 |
Semiconductor integrated circuits--General principles of measuRing methods of voltage comparators 半导体集成电路 电压比较器测试方法的基本原理 |
China National Standards Ring |
English PDF |
| GB/T 4377-1996 |
Semiconductor integrated circuits--General principles of measuRing methods of voltage regulator 半导体集成电路 电压调整器测试方法的基本原理 |
China National Standards Ring |
English PDF |
| GB/T 16445-1996 |
Planar double-enveloping worm geaRing accuracy 平面二次包络环面蜗杆传动精度 |
China National Standards Ring |
English PDF |
| GB/T 16443-1996 |
Planar double-enveloping worm geaRing geometrical data symbols 平面二次包络环面蜗杆传动几何要素代号 |
China National Standards Ring |
English PDF |
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