住友刀片数控160404
刀片氮化硼CNGA120408120404
住友刀片120408BNC200
住友氮化硼立方刀片
刀片A66N数控CNGA120404
CNGA12040412040401525CNGA
双头氮化硼淬火焊接材料
双头氮化硼车刀淬火