Drilling machines; Fluid couplings being parts of machines; Hydraulic pumps; Machine tools for removing waste material; Mine borers; Mineworking machines; Mining drill sharpeners; Oil field equipment, namely, drilling rig mechanization machines and devices; Oil refining machines; Pistons for engines; Pumps as parts of machines, motors and engines; Pumps for machines; Sewage pumps; Sludge pumps; Suction pumps; Valves being parts of machines; Valves for pumps