19 TESTING 试验
19.020 Test conditions and procedures in general 试验条件和规程综合
19.040 Environmental testing 环境试验
19.060 Mechanical testing 机械试验
19.080 Electrical and electronic testing 电工和电子试验
19.100 Non-destructive testing 无损检测
19.120 Particle size analysis. sieving 粒度分析、筛分
21 MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE 机械系统和通用件
21.020 Characteristics and design of machines, apparatus, equipment 机器、装置、设备的特性和设计
21.040 Screw threads 螺纹
21.040.01 Screw threads in general 螺纹综合
21.040.10 Metric screw threads 米制螺纹
21.040.20 Inch screw threads 英制螺纹
21.040.30 Special screw threads 特殊螺纹
21.060 Fasteners 紧固件
21.060.01 Fasteners in general 紧固件综合
21.060.10 Bolts, screws, studs 螺栓、螺钉、螺柱
21.060.20 Nuts 螺母
21.060.30 Washers, locking elements 垫圈、锁紧件
21.060.40 Rivets 铆钉
21.060.50 Pins, nails 销、钉
21.060.60 Rings, bushes, sleeves, collars 环、套管、管接头、承插
21.060.70 Clamps and staples 卡箍和U形环
21.060.99 Other fasteners 其他紧固件
21.080 Hinges, eyelets and other articulated joints 铰链、孔眼和其他关节连接件
21.100 Bearings 轴承
21.100.01 Bearings in general 轴承综合
21.100.10 Plain bearings 滑动轴承
21.100.20 Rolling bearings 滚动轴承
21.120 Shafts and couplings 轴和联轴器
21.120.01 Shafts and couplings in general 轴和联轴器综合
21.120.10 Shafts 轴
21.120.20 Couplings 联轴器、离合器、磨擦器
21.120.30 Keys and keyways, splines 键和键槽、花键
21.120.40 Balancing and balancing machines 平衡和平衡机
21.120.99 Other standards related to shafts and couplings 有关轴和联轴器的其他标准
21.140 Seals, glands 密封件、密封装置
21.160 Springs 弹簧
21.180 Housings, enclosures, other machine parts 机箱、外壳、其他机械部件
21.200 Gears 齿轮及齿轮传动
21.220 Flexible drives and transmissions 挠性传动和传送
21.220.01 Flexible drives and transmissions in general 挠性传动和传送综合
21.220.10 Belt drives and their components 带传动及其零件
21.220.20 Cable or rope drives and their components 缆索或绳索传动及其零件
21.220.30 Chain drives and their components 链传动及其零件
21.220.99 Other flexible drives and transmissions 其它挠性传动和传送
21.240 Rotary-reciprocating mechanisms and their parts 旋转-往复式机构及其部件
21.260 Lubrication systems 润滑系统
23 FLUID SYSTEMS AND COMPONENTS FOR GENERAL USE 流体系统和通用件
23.020 Fluid storage devices 流体存储装置
23.020.01 Fluid storage devices in general 流体存储装置综合
23.020.10 Stationary containers and tanks 固定容器和罐
23.020.20 Vessels and containers mounted on vehicles 车载槽罐和容器
23.020.30 Pressure vessels, gas cylinders 压力容器、气瓶
23.020.40 Cryogenic vessels 低温容器
23.020.99 Other fluid storage devices 其他流体存储装置
23.040 Pipeline components and pipelines 管道部件和管道
23.040.01 Pipeline components and pipelines in general 管道部件和管道综合
23.040.10 Iron and steel pipes 铁管和钢管
23.040.15 Non-ferrous metal pipes 有色金属管
23.040.20 Plastics pipes 塑料管
23.040.40 Metal fittings 金属配件
23.040.45 Plastics fittings 塑料配件
23.040.50 Pipes and fittings of other materials 其他材料的管和配件
23.040.60 Flanges, couplings and joints 法兰、管接头及其连接件
23.040.70 Hoses and hose assemblies 软管和软管组件
23.040.80 Seals for pipe and hose assemblies 管和软管组件的密封
23.040.99 Other pipeline components 其他管道部件
23.060 Valves 阀门
23.060.01 Valves in general 阀门综合
23.060.10 Globe valves 球阀
23.060.20 Ball and plug valves 球闸阀和旋塞阀
23.060.30 Gate valves 闸阀
23.060.40 Pressure regulators 压力调节器
23.060.50 Check valves 止回阀
23.060.99 Other valves 其他阀门
23.080 Pumps 泵
23.100 Fluid power systems 流体动力系统
23.100.01 Fluid power systems in general 流体动力系统综合
23.100.10 Pumps and motors 泵和马达
23.100.20 Cylinders 缸
23.100.
