Precleaner
预清机, 粗选机
🗣️ 情景例句
Pleased to meet you.
很高兴与你见面。
How many cans are you going to take?
你要拿几罐？
Once we get down to the oil, it usually flows to the surface because great pressure,
一旦到达油层，石油就会由于地下巨大的压力流到地面上来，