… separating, washing, crushing, grinding, mixing or kneading earth, stone, ores or other mineral substances, in solid …
Explanatory notes
… separating, washing, crushing, grinding, mixing or kneading earth, stone, ores or other mineral substances, in solid … usually according to the size or weight of the lumps or particles, or for washing the materials free of impurities. … with the aid of tools. (6) Machinery for moulding porcelain artificial teeth. (C) Machinery for agglomerating …