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问题详情

A distinguishing feature of an educator, when compared to other pumps, is the （）.

A、dischargeendbeingsmallerthanthesuctionend

B、smallsizeofimpeller

C、lackofmovingparts

D、easeatwhichthewearingringsmaybechanged

时间：2022-01-01 15:33 关键词：船舶辅助机械

答案解析

C

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