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單項選擇題

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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單項選擇題

The auxiliary engine and a cgenerator can be connected with （）.

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

單項選擇題

The amount of lubricating oil in the drain tank should be checked by （）.

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