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AIRCRAFT MAINTENANCE AND REPAIR SERVICES; RECONDITIONING, MAINTENANCE AND REPAIR OF AIRCRAFT PARTS AND COMPONENTS, INSTRUMENTS, AVIONICS AND TESTING INSTRUMENTS; DESIGN, MANUFACTURE, REPAIR, MODIFICATION, SALE AND LEASE OF AIRCRAFT AND AIRCRAFT PARTS AND TESTING INSTRUMENTS OF ALL KINDS; OPERATION OF AIRPORTS AND AIRPORT FIXED BASE OPERATIONS; DESIGN OF ALL TYPES OF BUILDINGS AND ITEMS RELATING TO AVIATION AIRCRAFT RELATED SERVICES OF ALL KINDS, INCLUDING BUT NOT LIMITED TO CLEANING, PAINTING, COMPOSITE WORK, REFURBISHMENT AND MODIFICATIONS