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單項選擇題

The bore of each cylinder is formed in a liner which can be （） when worn out.

A.welded
B.replaced
C.drilled again
D.bored

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單項選擇題

The bed-plate is secured in the longitudinal direction by means of bolts known as （）.

A.end-chock bolts
B.side-chock bolts
C.through bolts
D.tie rods

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