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问题详情

For one or two types of engine,the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through （）.

A、the cylinder cover

B、the bottom of bed-plate

C、the sump

D、the crankcase door

时间：2022-01-10 02:42 关键词：船舶动力装置海船船员考试

答案解析

D

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