检查进[排气门和气门座圈是否磨损或损坏；

Check into[whether friendly mount circle in the thumb latch in the air dishcarge thumb latch abrades or damages;

youdao

检查进[排气门和气门座圈是否磨损或损坏；

Check into[whether friendly mount circle in the thumb latch in the air dishcarge thumb latch abrades or damages;

youdao