GB/T 16608.52-2012
AbolishedElectromechanical all-or-nothing relays - Part 52: Blank detail specification - Electromechanical all-or-nothing telecom relays of assessed quality - Two change-over contacts, 20mm×10mm base
有或无机电继电器 第52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,20mm×10mm底座