Steel and metal pipes and tubing, including their parts and fittings thereof; joints; metal collars; metal junctions; seamless line pipe; welded line pipe; mother pipes; petrochemical pipes; boiler pipes; exchangers pipes; drilling pipes; steel and metal pipes and vessels used for transporting oil and fuel; tubes used in autoparts and safety devices; metal pipes.

Respirators and respiratory masks other than for artificial respiration for non-medical purposes; respirators for filtering air not for medical use; filters for respiratory masks; opto-electronic masks, namely, protective masks not for medical purposes; protective optical instruments, namely, protective eyewear; spectacles, optical correcting lenses, protective masks for the eyes; protective welders' screens; protective screens, films, filters and sheets for protecting face and eyes from acci...

Respirators other than for artificial respiration and respiratory masks for non-medical purposes; respirators for filtering air not for medical use; filters for respiratory masks; opto-electronic masks, namely, protective masks not for medical purposes; protective optical instruments, namely, protective eyewear; spectacles, optical correcting lenses, non-medical protective masks for eyes; protective welding screens; protective eye pieces, namely, screens, films, filters and strips for protect...

Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking, life-saving and teaching apparatus and instruments, namely, a telemetry system comprised of microprocessors and integrated transmitters and receivers that will monitor and analyze how individuals maintain their respiratory protection equipment and that will monitor vital data for safety purposes

Electrical energy; Natural gas; Renewable energy, namely, solar energy, wind energy and geothermal energy