Pneumatic positioner valve
[化] 气动阀门定位器
🧩 词语组成解析
[化] 定位器
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
The smog in L.A. is caused by air pollution and water vapor.
洛杉矶的烟雾是由空气污染和水蒸气造成的。
What were you doing when I called you on the telephone?
当我打电话给了你时，你正在做什么？
It's a very old castle. It is the oldest one in Britain.
这个城堡很古老，它是英国最老的了。