7
Oil and gas well downhole machines and equipment, namely, downhole submersible pump replacement systems comprised primarily of mechanical lifts for transporting downhole equipment, power supplies for submersible pumps, and a docking apparatus containing couplings for connecting mechanical lifts and power supplies to submersible pumps
37
Construction of systems for extracting oil, other fluids and gas from underground and underwater locations, namely, the installation, maintenance, repair and replacement thereof; advising services with respect to the above services; Consultation and technical consultation in the field of construction of systems for extracting oil, other fluids and gas from underground and underwater locations, namely, the installation, maintenance, repair and replacement thereof
42
Technical consultancy regarding the design of systems in the field of extracting oil, other fluids and gas from underground and underwater locations
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