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美帝国家航空与宇宙航行局马歇尔宇宙飞行中心已准备研究用激光多普勒系统来监飞机的翼梢旋伪。取自A津&ST,1970(Aug·93,滩弓,49
The Aerospace Marshall Space Flight Center at the National Aeronautics and Astronautics Agency is already preparing to study the use of a laser Doppler system to monitor the wingtip rotation of aircraft. Taken from A. Tsun & ST, 1970 (Aug. 93, Shinkan, 49