Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
I'm sorry but tonight you can borrow the car.
很抱歉现在不行，但是晚上你可以借用这车子。
Every salesman boasts of his own wares.
老王卖瓜，自卖自夸。
I'm glad to see you again.
很高兴再次见到你。