Servicing and repair of vehicles; maintaining, and repairing airplanes; maintenance and repair of equipment, machines, and engines on board airplanes; maintenance and repair of spare parts of airplanes; information in the field of maintenance and repair, namely, maintenance and repair of airplanes; installation, maintenance and repair of air conditioning apparatus; maintenance and repair of heating systems; maintenance and repair of electrical appliances; installation, maintenance and repair ...

Servicing and repair of vehicles; checking, maintaining, and repairing airplanes; checking, maintenance and repair of equipment, machines, and engines on board airplanes; cleaning and washing of airplanes; cleaning services for buildings; construction information; supervising construction work; warehouse construction and repair; installation, maintenance and repair of computers and computing equipment; construction of airports; installation and repair of air conditioning apparatus; installati...