|
|
| SECTION B– PERFORMING OPERATIONS; TRANSPORTING |
|
| B 28 | WORKING CEMENT, CLAY, OR STONE |
|
| B 28 B | SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B 22 C; working stone or stone-like material B 28 D; shaping of substances in a plastic state, in general B 29 C; making layered products not composed wholly of these substances B 32 B; shaping in situ, see the relevant classes of section E) |
|
| B 28 C | PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER (preparing material for foundry moulds B 22 C 5/00) |
|
| B 28 D | WORKING STONE OR STONE-LIKE MATERIALS (machinery for, or methods of, mining or quarrying E 21 C) |
|
 |