7 Machines for the drilling of oil and gas wells, namely, floating and non-floating drilling rigs; oil refining machines, namely, oil separators; machines for oil production and refining, namely, oil well pumping machines; petrochemical machines for petroleum exploitation and refining, namely, well drilling machines; oil well drilling machines, namely, oil drilling rigs; special mud pumps for the petroleum industry; rinsing machines, namely, washing machines for the petroleum industry; mine-working machines, namely, mine borers; machines and equipment for geological prospecting, mining and ore dressing, namely, drills for the mining industry, mining drill sharpeners; bitumen making machines, namely, machines for making asphalt; power operated spraying machines for chemical fertilizer; electro-mechanical machines for chemical industry, namely, emulsifying machines for chemical processing, disintegrators for chemical processing, grinding mills for chemical processing, oil filtering machines and coking machines; drilling machines; feeding apparatus for engine boilers, namely, fuel injectors, fuel cells; drilling bits for power drills; machines for carbon dioxide production, namely, separating machines for chemical processing, extracting machines for chemical processing; pumps, namely, oil drain pumps; valves, namely, valves for pumps, ball valves being parts of machines; pneumatic tube conveyors