switch frame造句

例句与造句

1. Earliest use of relays for switch control instead of direct operation of magnets over line wires . first die cast switch frame
   最早使用继电器。用于开关控制，从而代替了电线中对磁铁的直接操作。第一个压铸件开关架成形。
2. It's difficult to find switch frame in a sentence. 用switch frame造句挺难的