47685/47620-B轴承 47686/47620-B轴承 NK5/12TN轴承 495/493-B轴承 NK5/10B.TN轴承 580/572-B轴承 NK10/12轴承 NK8/12轴承 595/592-B轴承 663/652-B轴承 NK5/12轴承 757/752-B轴承 NK5/12TN轴承 839/832-B轴承 NK10/16轴承 NK10/12T2轴承