Clappet valve
[建] 止回阀
🧩 词语组成解析
[建] 止回阀
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
But it's fun.
但很有趣。
You don't have to pay any duty on personal belongings.
你不必在个人财产上付任何税。
Yes, I washed before breakfast.
洗了，我早饭前洗了脸。