单项选择题
A.2400mm B.2500mm C.2560mm D.2600mm
A.42726,152726型轴承 B.FAG804468A/804469A型轴承 C.进口SKF双列圆锥自密封型 D.BC1B322880、BC1B322881型轴承
A.450mm B.860mm C.680mm D.800mm
A.1 B.2 C.3 D.4
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