duty engine officer 值班轮机员
constant duty engine 定负载发动机
duty engine oil 重型发动机油
heavy duty engine 重负载发动机
light duty engine 轻型发动机
medium duty engine 中型发动机
medium m duty engine 中型发动机
heavy-duty engine oil 重型发动机油
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。
If crawling the Web empirically and without commercial bias is the moral duty of a search engine, Baidu is, at least in the eyes of its competitors, not a moral company.
如果说不带任何商业偏见地抓取网站是一个搜索引擎的道德义务的话，那么，至少在竞争者眼中，百度不是一个有道德的公司。
With the numerical simulation of heavy-duty diesel engine to strengthen performance, a CAD assembly model of cylinder head bolt is built based on the thread.
结合大功率柴油机性能强化的数值计算，在考虑螺纹的基础上建立了气缸盖螺栓的CAD装配体模型；
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