freeze plug

例句：

1. 1. The engineer used a special tool to freeze the plug and remove it without damaging the pipe.
   工程师使用特殊工具将塞子冻结并取出，而不损坏管道。
2. 2.The firefighters had to use a freeze plug to stop the leak before they could safely enter the building.
   消防员不得不使用一个冷冻塞来阻止泄漏，然后才能安全地进入大楼。
3. 3. The plumber replaced the freeze plug with a new one to prevent any further damage to the pipes.
   水管工用一个新的冷冻塞替换了旧的塞子，以防止对管道造成进一步的损害。