for grinding inorganic material, e.g. stone, ceramics, porcelain

Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor > characterised by a special design with respect to properties of the material of non-metallic articles to be ground > for grinding inorganic material, e.g. stone, ceramics, porcelain

Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor (B24B21/00 takes precedence; honing of plane surfaces on work B24B33/055) > characterised by a special design with respect to properties of the material of non-metallic articles to be ground > for grinding inorganic material, e.g. stone, ceramics, porcelain