标准摘要
[中文适用范围]： 交换系统和设备、电话、电报和数据设备、传感器、录音机和再现器。 [外文原描述]： Switching systems and equipment, telephone, telegraph and data equipment, transducers, recorders and reproducers.
英文名称Graphical symbols for diagrams. Part 9: Telecommunications: Switching and peripheral equipment.