问题
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A well-lubricated bearing surface always appears__________.
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Lubricating oil used in a diesel engine serves to _________.
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_______ diesel engines generally have two systems of lubrication: a total loss system feeding and a circulating system lubricating the running gear and cooling the pistons.
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Which of the listed cylinder liner surface conditions indicates proper lubrication?A.Dull
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Sludge may form. in the lubricating oil crankcase of a reciprocating air conditioning comp
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()provides strength and storage space for fuel,lubricating oil,fresh water,salt(ballast)wa
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