Sound signalling devices 声响信号发生器
Lighting and light signalling devices 照明和照明信号装置
Audible and optical signalling devices 声音和光电信号设备
Installation requirements of Lighting and Light - Signalling devices for 2 and 3 Wheelers, their Trailers and Semi-Trailers.
安装所需的照明及光信号装置，为第2和第3两轮车，其拖车及半拖车。
Performance Requirements of Lighting and Light-Signalling Devices for Motor vehicle having more than Three-Wheels, Trailer, Semi-Trailer.
性能要求的照明及光信号装置的机动车有四分之三以上的车轮，拖车，半拖车。
Low voltage surge protective devices - part 21: surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods.
低压电涌保护装置。第21部分：与电信和信令网络连接的电涌保护装置。性能要求和试验方法。
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