37 Construction, repair and installation services for all types of architecture and layout for the organisation of national and international events of all types, of exhibitions, fairs, trade fairs and of public or private events; installation services for systems or devices for signing, museography, electrical supply, systems for lighting, stage design, furnishing, furniture, heating, air conditioning, sound systems, wall of sound and images systems, film and video projection and captation devices on all media; construction and installation of platforms (stands) and other similar temporary structures; construction work management services; information services on construction for all permanent or temporary buildings and edifices; installing floral decorations