7 Oil, gas, geothermal, water development, and carbon dioxide field equipment, namely, drilling rig mechanization machines and devices; structural and replacement parts for drilling rig mechanization machines, namely, locks, nipples, expandables, cones, isolation valves, liner hangers, couplings, bushings, , manifolds, collars, cables, retainers, stabilizers, hold openers, mills, seals, plugs, drill bits, drill stems, tubes, tubing, swivels, half-mule shoes, guide shoes, burn shoes, washover shoes, drilling machine bearings , drilling machine rotors, packers, stators being parts of drilling rigs machines, safety valves, hangars, slicklines, pumps, tubing, pipes, pipe joints, safety joints, casings, and cables; pumps for use in irrigation systems; parts of oilfield wellhead machines, namely, chokes, degassers, and centrifuges; power operated pressure control equipment consisting of parts of oilfield wellhead machines, namely, chokes, degassers, centrifugal degassers, hydrogen sulfide mud gas separators, dual mud gas separators for horizontal drilling; machine parts, namely, rubber and metal mechanical o-ring seals used in equipment for oil and gas exploration and production; cutting machines and machine tools, namely, powered machines for cutting or shaping or finishing metals or other materials; precision machine tools, namely, hard metal tools, high speed steel (HSS) tools, carbide tools, ceramic tools, poly crystalline diamond (PCD) tools, and diamond-coated and diamond-uncoated tools, and hard metal tools, all for use in the cutting and forming of material by others; mechanical seals; air-operated power tools, namely, drills, grinders, and millers; drills for the mining industry; electric power drills; pneumatic hand-held drills; power drills; power tools, namely, reamers; electric welding machines; laser welding machines; friction-stir welding tools, namely, welding torches; electric welding machines, namely, friction-stir welding machines; bits for mining machines; bits for power drills; core drilling bits; mining bits; tool bits for machines; bearings, as parts of machines; roller bearings for machines; pump diaphragms; laser welding machines; electrodes for welding machines; electrical power generators using geothermal power; electrolysis machines for production of hydrogen gas; and machines for lithium mining