transportation services, namely, medical transportation of patients by air ambulance

mechanical, electrical and electronic apparatus for testing in the nature of rolling test benches for the testing of axles, wheels, suspensions for [ cars, lorries, buses, land vehicles and ] aircraft; mechanical, electrical and electronic apparatus for testing in the nature of brake test benches for the testing of brakes for [ cars, lorries, buses, land vehicles and ] aircraft; mechanical, electrical and electronic apparatus for the aircraft industry for the testing of hydraulic systems