Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
Ok, when you put it that way, I have to agree.
好的，你这样说的话，我也只得同意。
I'm Kathy King.
我是凯西·金。
Textile business has become more and more difficult since the competition grew.
随着竞争的加剧，纺织品贸易越来越难做了。