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
Where there's a will, there's a way.
有志者事竞成。
Example is better than precept.
言教不如身教。
Take it easy.
别紧张。