power operated diamond drilling rigs, rods and tools and parts therefor, namely, cores, barrels, diamond drilling bits and reaming shells; [ power operated diamond sawing and cutting machines and power operated diamond sawing and cutting tools, namely, circular and diamond wire saws; ] parts for power operated vibratory rotary and rotary percussion drilling rigs, machines and tools, namely, cemented tungsten carbide tipped drilling bits, tapered and threaded drilling rods, couplings and shanks [ ; high precision abrading and grinding machines and power operated tools, namely, diamond, cubic boron nitride and superhard abrasive containing grinding wheels; ] [ cemented tungsten carbide component parts for mining and industrial applications, namely, earth and rock drilling inserts for use on rotary/percussive rock drilling equipment; ] [ diamond synthesis, grinding burrs for use on metal deburring machines; and end mill rods for use on milling machines for metal removal in engineering and manufacturing work shops ]