三相插头 meaning in Chinese

triple cable plug

Technical requirements for single - phase and three - phase plugs and sockets
单相三相插头插座技术条件
Types , basic parameters and dimensions of three phase plugs and sockets
三相插头插座型式基本参数与尺寸
Three phases plugs and socket - outlets for household and similar purposes . types , basic parameters and dimensions
家用和类似用途三相插头插座型式基本参数和尺寸