Telecommunications, namely, cellular telephone communication, communication by telephone, communication by computer terminals, electronic mail, telecommunication routing and junction services, teleconferencing services

installation and repair of telecommunication equipment; residential and commercial building construction; house and building repair services; installation of pipelines; rental of building equipment, namely, tools and building materials; house and building demolition; maintenance, cleaning and renovation of buildings; pavement stripping

[ telecommunication apparatus and instruments, namely, radio telephones, telephone and radio telephones for recording messages, antennas and radio transmitter beacons for wireless telephony ]