37 INSTALLATION, MAINTENANCE AND REPAIR OF FIRE PREVENTION, FIRE DETECTION AND FIRE PROTECTION EQUIPMENT, NAMELY, CO2 HIGH PRESSURE FIXED FIRE FIGHTING EQUIPMENT, CO2 LOW PRESSURE FIXED FIRE FIGHTING EQUIPMENT, HALON ELECTRICALLY ACTIVATED FIXED FIREFIGHTING EQUIPMENT, HALON PNEUMATIC ACTIVATED FIXED FIREFIGHTING EQUIPMENT, FOAM FIXED FIREFIGHTING EQUIPMENT, TESTING OF LOW EXPANSION FOAM CONCENTRATES, DRY POWDER/CHEMICAL FIXED FIREFIGHTING EQUIPMENT, FIRE DETECTION/SMOKE DETECTION COMBINED WITH CO2 INSTALLATIONS, SELF-CONTAINED AIR BREATHING APPARATUSES/SMOKE HELMETS, FIREHOSES AND ASSOCIATE EQUIPMENT, PORTABLE AND MOBILE FIRE EXTINGUISHERS, HYDROSTATIC TEST OF PRESSURES VESSELS/BOTTLES, WATER SPRINKLER-LOW PRESSURE FIXED INSTALLATIONS, AND WATER FROTH-HIGH PRESSURE FIXED INSTALLATIONS