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An advantage of aluminum pistons, when compared to cast iron pistons is （）.

A、greater high temperature strength

B、better heat conductivity

C、greater weight per cubic inch

D、increased resistance to wear

时间：2022-01-01 15:34 关键词：船舶动力装置海船船员考试水路交通运输技能考试

答案解析

B

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