37 CONSTRUCTION OF COMMERCIAL AND RESIDENTIAL PROPERTIES; INSTALLATION OF FIXTURES, FITTINGS, FURNITURE AND FURNISHINGS; INSTALLATION OF APPARATUS FOR LIGHTING, HEATING, VENTILATING, REFRIGERATION, DRYING AND WATER SUPPLY; INSTALLATION OF ELECTRIC CABLING; INSTALLATION OF APPARATUS AND CABLING FOR DATA AND VOICE COMMUNICATION; INSTALLATION OF WALL-HANGINGS, BLINDS AND OTHER TYPES OF WALL AND WINDOW COVERINGS