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 machine tools 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 use with chemical fertilizer; Electromechanical machines for the 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 pump; Valves, namely valves for pumps, ball valves being parts of machines; Pneumatic tube conveyors