青云翻译

Pumping loss is a normal piston up and down the line need to suction and discharge exhaust

Pumping loss is a normal piston upper and lower rows require suction and discharge exhaust

The pump was mad the loss is refers to on the normal piston downward to need to inspire and to discharge the exhaust

Pump gas losses is a piston up and down the line Need Normal breathing and exhaust vent

Pumping loss is a normal piston upper and lower rows require suction and discharge exhaust