... Vacuum Heat Treatment,Germany grinding machine,CNC machine and so on.7)Commodity list: CommodityProjectpaper circular knivesMaterialSKH,SKD etc.Major ... 's requestService typeOEM,ODM etc.8)Advantages: Paper circular knives has good abrasion resistance and high processing accuracy.The ... strictly.The series ofknives make the incision margin of slitting materials neat,bright,clean,no burr and rough ...