CPC Subgroup
B21K 5/06 Dressing, e.g. sharpening rock drills
Full Title
Making tools or tool parts, e.g. pliers > drilling-tools or other for making or working on holes > Dressing, e.g. sharpening rock drills
B21K 5/06 Making tools or tool parts, e.g. pliers > drilling-tools or other for making or working on holes > Dressing, e.g. sharpening rock drills