... surface,steady tolerance, neat ribbon,used for electroplating and high speed punch6,heat exchanger: applied in nuclear power ... plant and submarine industry7,lead frame materials: LED,IT Products ... ,Y4,Y2,Y ≤2000 GB/T2059-2000 Supply industry and specifications, performance: Industry species Model Thickness(mm) Width(mm) ... ,Y4,Y2,Y1,Y,TY t2 copper product