CPC Subgroup
B28D 1/14 by boring or drilling (rotary drilling machines B23B; ; portabe percussive machines B25D; )
Full Title
Working stone or stone-like materials, e.g. brick, concrete , not provided for elsewhere; Machines, devices, tools therefor (fine working of gems, jewels, crystals B28D5/00; working by grinding or polishing B24; devices or means for dressing or conditioning abrasive surfaces B24B53/00) > by boring or drilling (rotary drilling machines B23B; ; portabe percussive machines B25D; )
2 direct subcodes
Child Classifications
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