repair and maintenance of technical apparatus; namely, computers, computerized work stations, control processing units, front-end processors, disk-storage systems, printers, terminals, magnetic tapes, tape-stations, [ measuring instruments and control engineering appliances; medical-technical apparatus; namely, computer diagnosis equipment, lithotripters, ultrasound diagnostic apparatus, infrared equipment, X-ray equipment and magnetic resonance systems; ] copying apparatus; namely, photocopying machines, facsimile machines [ and communication appliances; namely, telephone equipment, telephone control panels, switch boxes, telecommunication devices, telex equipment, office communication systems, audio devices, video devices, television devices and cameras ]

freight transportation by motor vehicles, railways, vessels and airplanes

[ computer software design for others; operation of computer testing centers for others and rental of computer testing centers ]