Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
Goodbye, it was a pleasure meeting you.
再见， 和你见面很高兴。
Whom will you send that to?
你将把那个送给谁？
Excuse me.Where's the nearest bus stop, please?
请问，最近的公共汽车站在哪儿？