31 ELECTRONICS 电子学
31.020 Electronic components in general 电子元件综合
31.040 Resistors 电阻器
31.040.01 Resistors in general 电阻器综合
31.040.10 Fixed resistors 固定电阻器
31.040.20 Protentiometer, variable resistors 电位器、可变电阻器
31.040.30 Thermistors 热敏电阻器
31.040.99 Other resistors 其他电阻器
31.060 Capacitors 电容器
31.060.01 Capacitors in general 电容器综合
31.060.10 Fixed capacitors 固定电容器
31.060.20 Ceramic and mica capacitors 陶瓷电容器和云母电容器
31.060.30 Paper and plastics capacitors 纸介电容器和塑料膜电容器
31.060.40 Tantalum electrolytic capacitors 钽电解电容器
31.060.50 Aluminium electrolytic capacitors 铝电解电容器
31.060.60 Variable capacitors 可变电容器
31.060.70 Power capacitors 电力电容器
31.060.99 Other capacitors 其他电容器
31.080 Semiconductor devices 半导体器件
31.080.01 Semiconductor devices in general 半导体器件综合
31.080.10 Diodes 二极管
31.080.20 Thyristors 晶体闸流管
31.080.30 Transistors 三极管
31.080.99 Other semiconductor devices 其他半导体器件
31.100 Electronic tubes 电子管
31.120 Electronic display devices 电子显示器件
31.140 Piezoelectric and dielectric devices 压电器件和介质器件
31.160 Electric filters 滤波器
31.180 Printed circuits and boards 印制电路和印制电路板
31.190 Electric component assemblies 电子器件组件
31.200 Integrated circuits. Microelectronics 集成电路、微电子学
31.220 Electromechanical components for electronic and telecommunications equipment 电子电信设备用机电零部件
31.220.01 Electromechanical components in general 机电零部件综合
31.220.10 Plug-and-socket devices. Connectors 插头和插座装置、连接器
31.220.20 Switches 开关
31.220.99 Other electromechanical components 其他机电零部件
31.240 Mechanical structures for electronic equipment 电子设备用机械构件
31.260 Optoelectronics. Laser equipment 光电子学、激光设备
33 TELECOMMUNICATIONS. AUDIO AND VIDEO ENGINEERING 电信、音频和视频技术
33.020 Telecommunications in general 电信综合
33.030 Telecommunication services. Applications 电信业务、应用
33.040 Telecommunication systems 电信系统
33.040.01 Telecommunication systems in general 电信系统综合
33.040.20 Transmission systems 传输系统
33.040.30 Switching and signalling systems 交换和信令系统
33.040.35 Telephone networks 电话网络
33.040.40 Data communication networks 数据通信网络
33.040.50 Lines, connections and circuits 线路、连接和电路
33.040.99 Other equipment for telecommunication systems 其他电话、电报和电信系统用设备
33.050 Telecommunication terminal equipment 电信终端设备
33.050.01 Telecommunication terminal equipment in general 电信终端设备综合
33.050.10 Telephone equipment 电话设备
33.050.20 Paging equipment 寻呼设备
33.050.30 Equipment for telex, teletext, telefax 用户电报、可视图文、传真设备
33.050.99 Other telecommunication terminal equipment 其他电信终端设备
33.060 Radiocommunications 无线通信
33.060.01 Radiocommunications in general 无线通信综合
33.060.20 Receiving and transmitting equipment 接收和发射设备
33.060.30 Radio relay and fixed satellite communications systems 无线中继和固定卫星通信系统
33.060.40 Cabled distribution systems 电缆分配系统
33.060.60 Mobile services, Terrestrial Trunked Radio(TETRA) 移动业务、地面无线中继线路
33.060.65 Mobile services, paging systems 移动业务、寻呼系统
33.060.70 Mobile services, Digital Enhanced Cordless Telecommunications(DECT) 移动业务、数字增强无绳电信系统(DECT)
33.060.75 Mobile services, Satellite 移动业务、卫星
33.060.80 Mobile servies, Global System for Mobile Communication(GSM) 移动业务、移动通信用全球系统(GSM)
33.060.99 Other equipment for radiocommunications 其他无线通信设备
33.080 Integrated Services Digital Network(ISDN) 综合业务数字网(ISDN)
33.100 Electromagnetic compatibility(EMC) 电磁兼容性(EMC)
33.100.01 Electromagnetic compatibility in general 电磁兼容性综合
33.100.10 Emission 发射
33.100.20
