BEM-5/8-20-502L 德国DURBAL轴承,CEUHM3710T-G图纸,CEUHM3710T-G 采购价格CEUHM3710T-G,CEUHM3710T-G货期 BEM-5/8-20-502L型号尺寸，BEM-5/8-20-502L轴承价格,BEM-5/8-20-502L采购 R17922重量,R17922尺寸,R17922参数