CR48x65x8CRW1R轴承 NUP2224E.TVP2轴承 6240轴承 NNF5028B.2LS.V轴承 6340轴承 CR48x65x8CRW1V轴承 6844轴承 CR48x65x10CRS1R轴承 NNC4930V.C3轴承 6944轴承 CR48x68x8CRW1R轴承 NNF5030B.2LS.V轴承 CR48X68X10HMS5RG轴承 NNF5032B.2LS.V轴承 16044轴承 NNF5034B.2LS.V轴承