Non-return valve
[化] 止逆阀; 单向阀
🏥 医学释义
单向活门，单向阀
🧩 词语组成解析
non
[[nɔn]]
adv. 非, 不
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
My pleasure.
不客气。
For a lost thing care nothing.
一事之失，不必介意。
One hour and seventeen minutes passed and we had not even covered half the distance.
1小时17分过去了，走了还不到一半路程。