Installation, repair and maintenance, in rooms and buildings, of pressure monitoring equipment, pressure control systems, over-pressure protection systems and apparatus for fire suppression systems, stairwell pressurisation systems and apparatus, air diffusers, alarm/monitoring systems for air pressure detection, computer hardware and software for air pressure monitoring and recording, air pressure stabilisers, pressure relief vents, stairwell pressure relief vents, air control blades for pressure stabilisers, and parts, fittings, accessories and fusible links for all the aforesaid goods
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