relief pressure valve

• 减压阀

relief pressure valve的用法和样例：

例句

1. 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。
2. 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。
3. Remove the elbows from the relief valve base.
   从安全阀底座拆卸弯头。
4. Never plug the discharge of a pressure safety relief valve!
   绝对不要堵塞压力安全阀的排泄口！