NKXR40T2Z 日本NTN精密主轴轴承 K47X52X27,NKXR40T2Z图纸,NKXR40T2Z 采购价格NKXR40T2Z,NKXR40T2Z货期 4T-1730货期价格,4T-1730图纸参数,4T-1730采购交期,