relieving valve

• 减压阀

relieving valve的用法和样例：

例句

1. Look for any signs of leaking between the gun and the unloader valve.
   检查一下水枪和减压阀是否有泄漏的迹象。
2. No relief valve is required where two pressure reducing valves are installed.
   如果装上两个减压阀，就不需要安全阀。