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單項選擇題

The bearing shells depend on the accuracy of （） to held them in a truly circular shape.

A.the gap
B.the clearance
C.the bore
D.the housing

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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

單項選擇題

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

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

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