;Print and recorded promotional materials of Hawk 4 and SparrowHawk Gyroplanes and Gyrodyne concept aircraft.
猎鹰四号,松雀鹰旋翼机和直升旋翼机的印刷及影视介绍.
Print and recorded promotional materials of Hawk 4 and SparrowHawk Gyroplanes and Gyrodyne concept aircraft.
猎鹰四号,松雀鹰旋翼机和直升旋翼机的印刷及影视介绍.
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