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【单选题】
液压装置空载时泵的排出和吸入油压之差反映了________的大小。
A.
液压泵机械摩擦损失
B.
管路流动损失
C.
执行机构机械摩擦损失
D.
B和C
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查看完整题目与答案
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A.
As far as
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