GB/T 16608.53-2012
AbolishedElectromechanical all-or-nothing relays - Part 53: Blank detail specification - Electromechanical all-or-nothing telecom relays of assessed quality - Two change-over contacts, 14mm×9mm base
有或无机电继电器 第53部分:空白详细规范 电信用有质量评定的有或无机电继电器 两组转换触点,14mm×9mm底座