單項(xiàng)選擇題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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1.單項(xiàng)選擇題The auxiliary engine and a cgenerator can be connected with ().

A.cam
B.crosshead
C.bulge
D.coupling

2.單項(xiàng)選擇題The amount of lubricating oil in the drain tank should be checked by ().

A.measuring
B.sounding rod
C.metering
D.weighting

3.單項(xiàng)選擇題The abbreviation TDC means ().

A.top dead center
B.temperature difference center
C.time delay dock
D.top diesel company

4.單項(xiàng)選擇題The abbreviation BDC means ().

A.Boston Diesel Company
B.base circle diameter
C.switch board case
D.bottom dead center