单项选择题
安装离心泵时,要求填料压盖与轴套外径间隙为()。
A.0.1~0.25mm
B.0.25~0.50mm
C.0.50~0.75mm
D.0.75~1mm
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单项选择题
A.0.1~0.25mm
B.0.25~0.50mm
C.0.50~0.75mm
D.0.75~1mm
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