The lower end of each piston rod is reduced in diameter to fit a bore in （）.

时间：2019-04-13 23:34:00 关键词：each,piston,rod

The lower end of each piston rod is reduced in diameter to fit a bore in （）.

A.the crosshead

B.the journals of the crosshead

C.the crosshead shoes

D.the guide

答案解析

A

举一反三

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The lower end of each piston rod is reduced in diameter to fit a bore in （）.

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