37 Repair, installation and maintenance services, namely, repair, installation and maintenance of machines and apparatus for lifting, loading, unloading and freighting purposes; repair, installation and maintenance of cranes, hoists, power-operated lifts and loaders for load handling, log stackers, reach stackers, harvesters, forklifts, all for lifting, loading, and unloading purposes, vehicles incorporating lifting, loading and unloading apparatus, hoists, and cranes; repair, installation and maintenance of forklift trucks, trucks, and tractors with mounted winches, hoists and cranes, log stackers; repair, installation, and maintenance of microprocessors, automatic control operating and diagnostic systems, ultrasonic testing apparatus, instruments and calculators for measuring length, weight and capacity, and emergency signal transmitters; repair, installation, and maintenance of computer hardware systems for real time monitoring, trouble shooting and data collecting, and repair, installation, and maintenance of computer hardware for use in machines and devices for lifting, loading and unloading purposes and land vehicles; information and consultancy services in the field of lifting, loading and unloading vehicle repair and maintenance