Piston valve
[机] 活塞阀
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
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
Feel free to look around.
请随意到处看看。
To push him down
把他推倒
but Mr.Scott cannot get a telephone for his new garage, so he has just bought twelve pigeons.
但詹姆斯。斯科特先生未能为他新的汽车修理部搞到一部电话机，所以他买了只鸽子。