01352nam 2200445 450 991071521880332120210201123135.0(CKB)5470000002509839(OCoLC)1235811433(EXLCZ)99547000000250983920210201j197910 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierMaterials for helicopter gears[Washington, D.C.] :National Aeronautics and Space Administration,October 1979.1 online resource (x, 89 pages) illustrationsNASA/CR ;163068"October 1979.""NMAB-351.""NF02052."Includes bibliographical references (pages 87-89).Aircraft designnasatAlloysnasatHelicoptersnasatCarburizingnasatAircraft design.Alloys.Helicopters.Carburizing.United States.National Aeronautics and Space Administration,National Materials Advisory Board (U.S.)GPOGPOBOOK9910715218803321Materials for helicopter gears3313200UNINA