CPC Subgroup
B28D 5/04 by tools other than rotary type, e.g. reciprocating tools
Full Title
Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor (working by grinding or polishing B24; for artistic purposes B44B) > by tools other than rotary type, e.g. reciprocating tools
3 direct subcodes
Child Classifications
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