单项选择题
多级泵中密封内径为120~180mm,则叶轮与密封环间隙为()。
A.0.10~0.14mm
B.0.14~0.24mm
C.0.24~0.30mm
D.0.30~0.36mm
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单项选择题
A.0.10~0.14mm
B.0.14~0.24mm
C.0.24~0.30mm
D.0.30~0.36mm
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