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單項選擇題

The lower end of each piston rod is reduced in diameter to fit a bore in （）, this being secured to the piston rod by a nut.

A.the crank-web
B.the connecting rod
C.the main bearing
D.the cross-head

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單項選擇題

The lower end of each piston rod is reduced in diameter to fit a bore in the cross-head, this being secured to the piston rod by （）.

A.a bolt
B.a cap
C.a disc
D.a nut

單項選擇題

The lower end of each piston rod is reduced in diameter to fit a bore in the （）, this being secured to the piston rod by a nut.

A.piston gudgeon pin
B.piston skirt
C.cross-head
D.cross-head pin

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