PK47X65X27.4X1 日本NTN精密主轴轴承 NU209EG1C3,PK47X65X27.4X1型号尺寸，PK47X65X27.4X1轴承价格,PK47X65X27.4X1采购 4T-23100/23256货期价格,4T-23100/23256图纸参数,4T-23100/23256采购交期,