37 Construction of stands for trade fairs, exhibitions and museums; display stand installation services; installing temporary structures for trade fairs, museums, trade shows and trade exhibitions, namely, signboard and panel installations; Building construction services; construction of temporary structures for museum, trade fairs, trade show, trade exhibitions, retail stores; display stand installation services for trade fairs, museums, trade shows, trade exhibitions and retail stores; installing temporary structures for trade fairs, museums, trade shows and trade exhibitions, namely display stands, freestanding panel units, lighting panels; installing signboards and panels; construction and assembly, namely, of electric lighting fixtures, display stands, stages, and booths; construction of temporary structures; installation services, namely, integrating lighting systems for exhibitions; on-site construction project management for exhibitions featuring of prototype machine and machinery installations, flat panel display screens, interactive computer kiosk systems comprised primarily of computer hardware and installation of exhibition lighting systems, installation of lighting devices and maintenance services therefor