NUCF30BR轴承 NUCF30-2BR轴承 NUCF10R轴承 NUCF10-1R轴承 NUCF12R轴承 NUCF12-1R轴承 NUCF16R轴承 NUCF18R轴承 NUCF20R轴承 NUCF20-1R轴承 NUCF24R轴承 NUCF24-1R轴承 NUCF30R轴承 NUCF30-2R轴承 CFS2轴承 CFS2V轴承