Agricultural equipment repair and maintenance; Farming equipment repair and maintenance; Installation and repair of telecommunication apparatus; Irrigation devices installation and repair; Maintenance and repair of communications systems; Maintenance and repair of computer hardware; Maintenance and repair of data communications networks; Maintenance and repair of electronic apparatus; Maintenance and repair of electronic installations; Maintenance and repair of instruments; Maintenance and repair of telecommunications apparatus; Maintenance, installation and repair of industrial apparatus and instruments; Repair of electronic apparatus; Repair of medical apparatus