sale, inspection, repair and installation of the following equipment:
-extinguishers
-hydrants
-fire door
-fire dampers
-flaps for heat and smoke removal
-fire valves
-fire wall closures
-fire protection of columns
-fire-protected ceilings
-sealing of joints and expansion joints
-fire safe glass walls
-fire safety of air conditioning
-fire safe penetrations of pipes and cables
-fire protection installation ducts
-fire protection coatings of wood and metal
-fire ladders
-fire and safety markings