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单选题
下列泵中不适合作液压泵用的是（）。
A
柱塞泵
B
齿轮泵
C
螺杆泵
D
离心泵
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re-evaporatorB
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dehydratorD
solenoid
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the steering pumps overspeedingB
a jammed open relief valeC
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