图 Orville demonstrating the flyer to the U.S.Army,Fort Myer, Virginia September 1908.Photo:by C.H.Claudy. 材料科学与工程学院 School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering Orville demonstrating the flyer to the U.S. Army, Fort Myer, Virginia September 1908. Photo: by C.H. Claudy