The oil is drawn from a drain tank through （）， one of a pair of pumps， into one of fine filters.
举一反三
- The lubricating oil is pumped from the drain tank， very often with （） in the suction line.
- The amount of lubricating oil in the drain tank should be checked by （）.
- The fine filters will be arranged （） one can be cleaned while the other is operating.
- Lubricating oil for an engine is stored at the bottom of the （）， known as the sump or in a drain tank located beneath the engine.
- From the pump, the oil is forced through the _____ and the oil cooler into the main oil gallery.The oil is fed from the _____, through individual passages, to the main crankshaft bearings and one end of the hollow camshaft.The cylinder walls and the teeth of many gears are lubricated by oil spray thrown off by the rotating _____.After the oil has served its purpose, it drains back to the ____ to be used again.