Metal valve assemblies not being parts of machines for the nuclear, oil and hydroelectric power industry; Metal control valves not being parts of machines for the nuclear, oil and hydroelectric power industry; Metal extraction valves not being parts of machines for the nuclear, oil and hydroelectric power industry; Metal valves not being parts of machines for the nuclear, oil and hydroelectric power industry; Metal valves for controlling the flow of liquids in pipes for the nuclear, oil and hydroelectric power industry; Steel rods for the nuclear, oil and hydroelectric power industry; Metal rods for the nuclear, oil and hydroelectric power industry; Scaffolding apparatus of metal for the nuclear, oil and hydroelectric power industry; Metal elbows for connecting gas pipes to gas appliances for the nuclear, oil and hydroelectric power industry; Metal gates for the nuclear, oil and hydroelectric power industry; Metal couplings for hydraulic apparatus for the nuclear, oil and hydroelectric power industry

Coupling machines for the nuclear, oil and hydroelectric power industry; Articulated coupling for the nuclear, oil and hydroelectric power industry; Shaft couplings machines for the nuclear, oil and hydroelectric power industry; Motor starters for the nuclear, oil and hydroelectric power industry; Shaft couplings as machine parts for the nuclear, oil and hydroelectric power industry; Lifting couplings incorporating mechanisms for handling products for the nuclear, oil and hydroelectric power industry; Machine couplings for the nuclear, oil and hydroelectric power industry; Metal couplings for hydraulic apparatus for the nuclear, oil and hydroelectric power industry; Safety couplings for machines for the nuclear, oil and hydroelectric power industry; Overload clutches machine parts for the nuclear, oil and hydroelectric power industry; Machinery transmission couplings for the nuclear, oil and hydroelectric power industry; Distributors for the nuclear, oil and hydroelectric power industry; Intake manifolds for motors and engines for the nuclear, oil and hydroelectric power industry; silage distributors machines for the nuclear, oil and hydroelectric power industry; Water pivots hydraulic couplings for the nuclear, oil and hydroelectric power industry

Automatic vacuum control devices; Scientific leak detectors for determining water content in petroleum products; Mechanical coding devices; Automatic control devices; Gas flow control devices; Programmable control devices; Detection devices; Automatic dosing devices; Volumetric measuring devices; Regulating and control apparatus; Uninterruptible power supply apparatus; Regulated power supply apparatus; Thermosonic joining apparatus; Detection apparatus and instruments; Electrical devices for processes control; Gas detectors for detecting the presence of gas; Electric power-line transmission machines and apparatus; Software; Electric valves thermionic; Electric control valves

Construction of structures for the storage of crude oil; Construction of structures for the production of crude oil; Construction of hydroelectric factories; Construction of oil and gas storage facilities; Extraction of oil from oil fields; Oil extraction; Mining extraction; Installation of oil production apparatus; Installation of oil exploration instruments; Installation of oil refineries; Installation of hydroelectric systems; Maintenance and repair of oil and gas maintenance facilities; Drilling of water and oil wells; Drilling of deep oil and gas wells; Oil drilling and pumping; Renovation of nuclear power plants; Repair or maintenance of nuclear power plants; Oil well casing, tubing, and drill pipe installation; Oil extraction services; Oil drilling services