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

单选题
2022-06-30 06:15
A、up and down；reciprocating
B、up and down；rotating
C、back and forth；reciprocating
D、back and forth；rotating
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正确答案
A
试题解析
标签： 船舶电气与船舶安全
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