multigrade gear oil 多级齿轮油
multigrade engine oil 多级发动机油
multigrade motor oil 广用机油
multigrade hydraulic oil 多级液压油
multigrade generation oil 多级四代油
multigrade generation 4 oil 多级四代油
Use of the fourth generation multigrade oil for diesel engine can cut down the warming up hours, save energy, reduce engine wear, and so on.
多级四代机油具有良好的低温起动性能以及节能性能，使用该油品可以缩短打温时间、节约能源、减少柴油机磨损等。
The volatility and valve train wear are the two difficulties encounted inthe formulation of low viscosity multigrade engine oil.
研究和制备低粘度多级油应充分考虑挥发性和磨损。
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