Reduction valve
[化] 减压阀
🧩 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
Oh, Grandpa! How exciting!
啊 ，爷爷， 你真了不起。
How many boxes are you going to use?
你要用几盒？
Last year was a bad year for the company. There was a big fall in sales.
去年公司不景气。销售额骤减。