Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
Today is pretty cold.
今天挺冷的
How would 12:45 be?
12:45怎么样？
Are you coming with us tomorrow ? Uncle Li said we could borrow his boat.
明天你和我们一起去吗？李叔叔说我们可以借用他的船。