PV

Couplings and joints of metal for pipes; metal expansion joints for piping and ducting; pipes and tubes of metal; manually operated metal valves, other than parts of machines; valves of metal, other than parts of machines, including those made from alloy steel and titanium

HYDROELECTRIC INSTALLATIONS FOR GENERATING ELECTRICITY, NAMELY, HYDROELECTRIC POWER GENERATORS; PUMP CONTROL VALVES; DOSING VALVES BEING PARTS OF MACHINES; VALVES FOR PUMPS; CONTROL VALVES FOR REGULATING THE FLOW OF GASES AND LIQUIDS BEING PARTS OF MACHINES; MINING MACHINES AND APPARATUS, NAMELY, MINE BORERS AND DRILLS FOR THE MINING INDUSTRY

RESISTANCE MEASURING INSTRUMENTS; FIRE-EXTINGUISHING SYSTEMS; INDUSTRIAL PROCESS CONTROL SOFTWARE; ELECTRICAL CONTROL, TESTING AND MONITORING APPARATUS, NAMELY, ELECTRICAL CONDUCTIVITY MONITOR FOR MONITORING THE CONDUCTOR AMPACITY IN OVERHEAD TRANSMISSION LINES; ELECTRICAL CONTROL PANELS FOR SECURITY ALARMS; ELECTRONIC APPARATUS FOR THE REMOTE CONTROL OF SIGNALS

INSTALLATION OF APPARATUS FOR THE PRODUCTION OF OIL; CONSTRUCTION OF STRUCTURES FOR THE PRODUCTION OF NATURAL GAS; INSTALLATION OF APPARATUS FOR GENERATING POWER; INSTALLATION, MAINTENANCE AND REPAIR OF APPARATUS FOR GENERATING ELECTRICITY; MAINTENANCE OF APPARATUS AND INSTALLATIONS FOR GENERATING POWER; SERVICING, NAMELY, MAINTENANCE AND REPAIR OF APPARATUS AND INSTALLATIONS FOR GENERATING POWER; REPAIR OF APPARATUS AND INSTALLATIONS FOR GENERATING POWER; REPAIR OF INSTALLATIONS FOR USE IN METAL PRODUCTION, METAL PROCESSING AND METAL WORKING; INSTALLATION, MAINTENANCE AND REPAIR OF APPARATUS FOR GENERATING POWER; MAINTENANCE AND REPAIR OF APPARATUS AND INSTALLATIONS FOR GENERATING POWER; CONSTRUCTION OF STRUCTURES FOR THE STORAGE OF NATURAL GAS; CONSTRUCTION OF STRUCTURES FOR THE TRANSPORTATION OF NATURAL GAS; INSTALLATION OF GAS SUPPLY AND DISTRIBUTION APPARATUS; RENTAL OF OIL WELL DRILLING TOOLS; CONSTRUCTION OF OIL PIPELINES; INSTALLATION OF GAS AND WATER PIPELINES; INSTALLATION OF PLUMBING; INSTALLATION OF WATER PIPES; REPAIR OR MAINTENANCE OF CHEMICAL PLANTS; REPAIR OR MAINTENANCE OF CHEMICAL PROCESSING MACHINES AND APPARATUS

[ SCIENTIFIC LABORATORY SERVICES; MATERIAL TESTING; ENGINEERING SERVICES FOR THE GAS INDUSTRY; ENGINEERING SERVICES RELATING TO ENERGY SUPPLY SYSTEMS; ENGINEERING SERVICES RELATING TO GAS TRANSPORT AND SUPPLY SYSTEMS; TECHNOLOGICAL CONSULTANCY IN THE FIELD OF ALTERNATIVE ENERGY GENERATION; RESEARCH AND DEVELOPMENT SERVICES IN THE FIELD OF CHEMISTRY; ENGINEERING SERVICES IN THE FIELD OF ENERGY TECHNOLOGY; GRAPHIC ART DESIGN; ENGINEERING DESIGN; DESIGN OF MACHINES, APPARATUS AND INSTRUMENTS; DESIGN AND DEVELOPMENT OF COMPUTER SOFTWARE FOR PROCESS CONTROL ]