单项选择题
A.50hB.100hC.150hD.200h
A.50hB.60hC.70hD.80h
A.600~700kPaB.650~750kPaC.660~735kPaD.750~900kPa
A.油泵温度过高B.油泵回油管漏油严重C.油泵噪声过大D.油泵振动大
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