socket outlet

基本解释

The plug will fit into a car's socket, with the other end fitting into a standard 110-volt or 220-volt outlet.
插头一端可连接汽车插座，另一端连接110伏/220伏标准电源。
If inlet end adopt socket weld and outlet end adopts threaded connection, use "U"to express connection unit "S".
如进口端采用承插焊，出口端采用螺纹，则连接单元“S”用“U”表示。
Gauge for two-pole plug's insertability: Both sides' pin of the gauge can be introduced freely and fully into the socket outlet.
插座插孔（两极）开孔间距的测量制具：该制具两侧的插针，都应该可以自由地插入到插座孔内。