Whether reasonable replacement of engine oil of oilfield-used heavy trucks directly affects the life cycle of engine,consumption of lubricating oil and economic benefit of transportation industry.
英
美
- 是否合理更换油田用重型汽车发动机润滑油,直接影响着发动机的使用寿命、润滑油的消耗量以及运输业的经济效益。