master valve

• 总阀

master valve的用法和样例：

例句

1. If the building smells like gas, open windows and doors, turn off the main gas valve, and leave.
   如果在建筑物中闻到了煤气味，请打开门窗，关闭煤气总阀，然后离开。
2. He checked the flow of water by shutting off the main valve.
   通过关上主阀他中断了水流。