NU230EM轴承天津NSK轴承NSK单列圆柱滚子轴承克迪斯轴承外形尺寸及参数表轴承型号外形尺寸（内径x外径x高）克NSK轴承N228EM轴承140x250x42迪NSK轴承NU228EM轴承140x250x42斯NSK轴承NJ228EM轴承140x250x42轴NSK轴承NUP228EM轴承140x250x42承NSK轴承RNU228EM轴承169x250x42NSK轴承RN228EM轴承140x221x42)