37 CONSTRUCTION, INSTALLATION, MAINTENANCE AND REPAIR OF PIPELINES FOR CRUDE OIL, NATURAL GAS AND THEIR PRODUCTS, OIL RIGS, OIL DRILLING EQUIPMENT, OIL AND GAS FIELD PLANTS, CRUDE OIL PROCESSING PLANTS, PETROCHEMICAL PLANTS, BIOGAS PLANTS, TANK FARM EQUIPMENT, ELECTRICAL SUPPLY UNLOADING FACILITIES; INSTALLATION OF PNEUMATIC OR ELECTRONIC METERING AND CONTROL EQUIPMENT, TELECOMMUNICATION AND DATA TRANSMISSION INSTALLATIONS, SAFETY AND FIRE FIGHTING SYSTEMS, PIPING, ELECTRICAL MEASUREMENT AND CONTROL ELECTRICAL CABLE AND OVERHEAD LINES; CONSTRUCTION OF ROADS, BRIDGES AND OIL WELL SITES; CONSTRUCTION SUPERVISION; CUSTOM MANUFACTURE, AND INSTALLATION OF EQUIPMENT FOR USE IN REFINERIES, PETROCHEMICAL PLANTS AND STORAGE TERMINALS, GAS AND OIL EXPLORATION PROJECT MANAGEMENT