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6
Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores.
oil field equipment-namely, tubing, casing, couplings, and steel castings
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7
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.
[ drill pipe, sucker rods, drill collars, reamers, stabilizers; ] oil field and pipeline machinery-namely, brake rimss for drilling rig drawworks, pump parts, mud pumps pulsation dampeners portable boring bars, elevators for lifting drill pipe and casing, shock tools, pipelin launcher/receivers, custom built hard banding machines for tool joint mainenance if sold from stock, power tongs, backout tools, spinning catheads, breakout cat-heads, duo-stop, hydraulic lifts, derrick mounted lifts, kelly spinners, tong blocks, submersible hydraulic actuators, pneumatic actuators, gas rotary actuators,yhydraulic rotary actuators, rotary valve actuators, hydraulic chokes, pneumatic and adapters and teeth for earth moving machinery
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9
Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
hydraulic torque indicators and jerkline tension indicators, automatic drillers (pneumatic controllers), weight indicators, tension controllers, electric actuators, switches for actuators, electric chokes, control consoles for hydraulic, electric and pneumatic chokes