The difficulty and countermeasures in diesel engine burning heavy fuel were discussed taking into account the characteristics of heavy fuel.
围绕重柴油的特性讨论了其在机车柴油机上燃用的难点及对策。
It's the most advanced heavy-duty engine oil yet developed by Shell and provides high protection even at the low-viscosity levels required for optimal fuel economy.
这是最先进的重型发动机油尚未开发的壳牌公司，并提供高度保护，甚至在低粘度所需的水平最佳的燃油经济性。
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