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On a medium－speed main propulsion diesel engine, the crank－pin or crank journalbearing

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On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).

A.a spindle lubricator

B.an oil jet

C.internal splashing

D.drilled passages in the crankshaft

参考答案:

D解析：medium：中等，介质;pin：销，刺穿，钉住;journal：轴颈;spindle：芯轴，转轴;lubricator：注油器;splash：飞溅译文：对于中速主推进柴油机，曲柄销轴承通过曲轴内钻孔的油道供油润滑。

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