relay valve

• 中继阀,继动阀,减压阀

relay 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。
3. The safety valve of his anger opened.
   他控制怒火的安全阀打开了。
4. There must be no valve between the relief valve and heater.
   在安全阀和热水器之间不能够安装任何阀门。