A、combustion gas blow-by
B、excessive lubrication
C、properly functioning rings
D、insufficient cylinder cooling
更多“A bright shiny appearance of the sealing surfaces on diesel engine compression rings indicates（）”相关的问题
A、2.5 times as bright as a second magnitude star B、3 times as bright as a second magnitude star C、5 times as bright as a second magnitude star D、10 times as bright as a second magnitude star
A、dark red and has a steady flow B、bright red and slow C、bright red and spurting D、dark red and spurting
A、dark red with a steady flow B、bright red with a steady flow C、bright red and in spurts D、dark red and in spurts
A、A flashing light combined with a fixed light of greater brightness B、Light flashes combined in groups，with a different number of flashes in each group C、A light showing groups of two or more flashes at regular intervals D、A fixed light varied at regular intervals by groups of two or more flashes of greater brightness
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