单项选择题
The bearing shell generally has () for location and oil grooves round the center of its axial length.
A.tips
B.tags
C.lips
D.keys
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The auxiliary engine and a cgenerator can be connected with ().
A.cam
B.crosshead
C.bulge
D.coupling -
单项选择题
The amount of lubricating oil in the drain tank should be checked by ().
A.measuring
B.sounding rod
C.metering
D.weighting -
单项选择题
The abbreviation TDC means ().
A.top dead center
B.temperature difference center
C.time delay dock
D.top diesel company
