Return valve
[化] 回路阀
🧩 词语组成解析
valve
[vælv]
n. 阀;真空管;（管乐器的）活栓;（心脏的）瓣膜;
vt. 装阀于;以活门调节;
🗣️ 情景例句
What does NATO mean?
NATO是什么意思？
The lawyer must announce that you are the true inheritor of the family fortune.
律师必须公布你就是真正的遗产继承人。
That's why I didn't see the sign.
所以我才没看见那牌子。