The slippers run () in the crosshead guides as the...
单选题

The slippers run () in the crosshead guides as the piston and rod are ()and prevent the top of the connecting rod from moving sideways.

发布日期:2021-03-22

A.up and down;reciprocating

B.up and down;rotating

C.back and forth;reciprocating

D.back and forth;rotating

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