单项选择题
A.大于 B.等于 C.小于
A.圆锥滚子轴承 B.圆柱滚子轴承 C.深沟球轴承 D.推力球轴承
A.10mm B.100mm C.50mm D.310mm
A.60220 B.6220/P0 C.60220/P0 D.6220
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