Installation and maintenance of fire protection systems: detection and alarm, water supply, hydrants, fire extinguishers, equipped fire hydrants, dry column, fixed extinguishing by automatic sprinklers and water spray, fixed extinguishing by water mist, fixed extinguishing by physical foam, fixed extinguishing by powder, fixed extinguishing by gaseous extinguishing agents, fixed extinguishing by condensed aerosols, smoke and heat control, luminescent signaling