313837-1轴承 234724-M-SP轴承 CR48X70X10HMSA10V轴承 NA4926UU轴承 NUP312E轴承 313837A轴承 VU140179轴承 NA4928UU轴承 NUP2304EC轴承 CR48X72X7HMS5RG轴承 44FC31225A轴承 XU120179轴承 NUP2322ECP轴承 CR48X72X7HMS5V轴承 44FC32210轴承 NA49/32U轴承