warming-up orifice

例句：

1. 1.The engine needs to be warmed up before starting the car.
   汽车启动前需要预热发动机。
2. 2. The engineer used a warming-up orifice to reduce friction in the machine.
   工程师使用一个预热通道来减少机器中的摩擦。
3. 3. During the winter, it's important to warm up the body before exercising.
   在冬天，锻炼前要预热身体。