Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
I hate animals, they smell and they're noisy.
我讨厌动物，它们很臭而且很吵。
Nothing so bad, as not to be good for something.
塞翁失马，安知非福。
Not at all.
不用谢。