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Aircraft Bell UH-1 Iroquois Hiller OH-23 Raven Boeing CH-47 Chinook Piasecki H-21 Sikorsky H-34 Lycoming T53 Rotorcraft Military aircraft Military helicopters | DESIGNATION OF ARMY AIRCRAFT OBSERVATION SERIES HELICOPTER SERIES DESIGNATIONAdd to Reading ListSource URL: www.virtual.vietnam.ttu.eduDownload Document from Source WebsiteFile Size: 47,53 KBShare Document on Facebook |
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