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美国麦克唐纳·道格拉斯飞机公司接受空军一项研制激光空间通信系统的合同。合同费为3,630万美元,时间为5年。这种通
The United States McDonnell Douglas Aircraft Corporation accepted the Air Force contract for the development of a laser space communications system. The contract fee was 36.3 million US dollars for 5 years. This kind of communication