plug-in type supply circuit

例句：

1. 1.The new power supply circuit is more efficient than the old one.
   新的供电电路比旧的更高效。
2. 2.The engineer designed a plug-in type supply circuit for the new machine.
   工程师为新机器设计了一个插头式供电电路。
3. 3.The plug-in type supply circuit ensures that the power is always available even when the mains power goes out.
   插头式供电电路确保即使在主电源中断时也能提供电力。