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| SECTION B– PERFORMING OPERATIONS; TRANSPORTING |
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| B 28 | WORKING CEMENT, CLAY, OR STONE |
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| B 28 D | WORKING STONE OR STONE-LIKE MATERIALS (machinery for, or methods of, mining or quarrying E 21 C) |
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1/ | 00 | Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor (fine working of gems, jewels, crystals B 28 D 5/00; working by grinding or polishing B 24; devices or means for dressing or conditioning abrasive surfaces B 24 B 53/00) |
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1/ | 02 | . | by sawing |
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1/ | 04 | . | . | with circular saw blades or saw discs (B 28 D 1/10 takes precedence) |
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1/ | 06 | . | . | with reciprocating saw blades (B 28 D 1/10 takes precedence) |
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1/ | 08 | . | . | with saw blades of endless cutter-type, e.g. chain saws, strap saws (B 28 D 1/10 takes precedence) |
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1/ | 10 | . | . | with provision for measuring |
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1/ | 12 | . | . | Saw blades specially adapted for working stone |
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1/ | 14 | . | by boring or drilling (rotary drilling machines B 23 B; portable percussive machines B 25 D) |
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1/ | 16 | . | by turning |
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1/ | 18 | . | by milling, e.g. channelling by means of milling tools |
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1/ | 20 | . | by planing, e.g. channeling by means of planing tools |
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1/ | 22 | . | by cutting, e.g. incising |
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1/ | 24 | . | . | with cutting discs |
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1/ | 26 | . | by impact tools, e.g. by chisels or other tools having a cutting edge (portable percussive machines B 25 D) |
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1/ | 28 | . | . | without cutting edge |
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1/ | 30 | . | to form contours, i.e. curved surfaces, irrespective of the method of working used (for artistic purposes B 44 B) |
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1/ | 32 | . | Methods or apparatus specially adapted for working materials which can easily be split, e.g. mica, slate, schist |
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3/ | 00 | Dressing mill discs or rollers (dressing the tools of sawing machines or sawing devices B 23 D 63/00; treating the cutting members of cutting machines to facilitate cutting B 26 D 7/08) |
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3/ | 02 | . | Machines |
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3/ | 04 | . | . | for grooving rollers |
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5/ | 00 | Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor (working by grinding or polishing B 24; for artistic purposes B 44 B; by non-mechanical methods C 04 B 41/00; non-mechanical after-treatment of single crystals C 30 B 33/00) |
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5/ | 02 | . | by rotary tools, e.g. drills |
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5/ | 04 | . | by tools other than of rotary type, e.g. reciprocating tools |
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7/ | 00 | Accessories specially adapted for use with machines or devices of the preceding groups |
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7/ | 02 | . | for removing or laying dust, e.g. by spraying liquids; for cooling work |
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7/ | 04 | . | for supporting or holding work |
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