Pilot(operated)valve
[化] 导阀
🗣️ 情景例句
Loosen up! it's not worth getting upset about.
放松点儿！ 不值得为这件事苦恼。
How long will you be out?
你将出去多久？
Please stop me if you have any question.
有任何问题，请随时叫我停下来。