问题
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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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In diesel engines designed with a crosshead, the motion of the piston rod can be described as _____.
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For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an _
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Cylinder liner cooling is often referred to as _____.A.piston coolingB.sleeve coolingC.cen
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Perspiration, the bodys built-in cooling mechanism occurs as a natural reaction to nervous
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Language belongs to each one of us to the flower-seller ________ to th A) as much
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