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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.
valves of metal not being parts of machines, namely, manually-operated gate valves and manually operating fracking valves; manually operated, metal oil drilling and production manifolds for pipelines; metal zipper manifolds for pipelines
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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.
parts of oilfield wellhead machines, namely, gate valves, ball valves, check valves, plug valves, globe valves, casing heads, tubing heads, casing spools, choke and manifold industrial pumps, pump and valve parts, pipe fittings and flanges
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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.
automatic valves used in oil and gas fracturing in the nature of fracking stacks; oil well christmas trees in the nature of an assembly of valves, spools, and fittings that control the flow of oil or gas out of a well; safety valves for flow shutoff in well construction; automatic control valves for regulating the flow of gases and liquids; pressure relief valves used in oil drilling and production
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37
Building construction; repair; installation services
rental of industrial equipment used for fracking, namely, wellhead systems, manifolds, valves, fracking stacks, flanges, chokes, and plug catchers; repair and maintenance of construction and industrial equipment for others; installation of oil and gas fracturing equipment for others
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40
Treatment of materials
machine shop services, namely, machining parts for others