CPC Subgroup
B23C 3/20 for shaping dies
Full Title
Milling particular work; Special milling operations; Machines therefor (milling gear-teeth B23F, ) > Working surfaces curved in two directions > for shaping dies
B23C 3/20 Milling particular work; Special milling operations; Machines therefor (milling gear-teeth B23F, ) > Working surfaces curved in two directions > for shaping dies