CPC Main Group
B21D 28/00 Shaping by press-cutting; Perforating
4 direct subcodes
Child Classifications
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- B21D 28/02 Punching blanks or articles with or without obtaining scrap (cutting nails or pins from strips or sheet material B21G3/26); Notching
- B21D 28/24 Perforating, i.e. punching holes