42 Industrial, scientific and technological services and research and design relating thereto, exclusively in the field of aviation; industrial analyses in the field of aviation; scientific and technological services, engineering services for the provision of scientific and technological assessments, calculations, research and advice in the field of aviation; technical consultancy, assessment, research, testing and monitoring services in the field of aviation; material testing in the field of aviation; technical drawing, design and development of aviation equipment; engineering (technical assessment) in the field of aviation; mechanical research in the field of aviation; research in the field of aviation; flight simulation technology services; preparation and conduct of technical project studies in the field of aviation; design of interior decor in relation to aircraft cabins; graphic designer services in relation to aircraft cabins; testing and engineering services for the certification of the quality or standards of air vehicles; technical flight tests; technical flight testing; design services for airplanes and aircraft interior furnishings; aircraft and aeroplanes cabin design services; aircraft and aeroplanes interior decoration services; provision of services of scientific, technical and technological assistance centres relating to aviation; technical advice and consultancy relating to avionics for aircraft and aeroplanes; engineering solutions relating to the modification of aircraft, aeroplanes and air vehicles