Matching tangs and holes complete the connections between the wires. The plugs and receptacles have locking devices that prevent their coming loose in operation.

• 只要简单地把插头插入插座,一次就可以完成很多电线的连接。相关的插头和插孔使电线连结在一起,插头和插座都有锁止装置,以避免在行驶中发生松动。