B24D 3/10

Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic {or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements} for porous or cellular structure, e.g. for use with diamonds as abrasives