Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment; section 2: Shock and bump tests (IEC 60255-21-2:1988); German version EN 60255-21-2:1995
电气继电器.第21部分:测量继电器和保护设备的振动、冲击、碰撞和地震试验;第2节:冲击和碰撞试验(IEC 60255-21-2-1988);德文版EN 60255-21-2:1995