In 1999, NASA selected Boeing Integrated Defense Systems to design and develop the vehicle, which was built by the California branch of Boeing's Phantom Works.
1999年，美国航天局选定波音综合防务系统设计和开发的车辆，这是建造的加利福尼亚分公司的波音鬼怪工程。
In 1999, NASA selected Boeing Integrated Defense Systems to design and develop the vehicle, which was built by the California branch of Boeing's Phantom Works.
1999年，美国航天局选定波音综合防务系统设计和开发的车辆，这是建造的加利福尼亚分公司的波音鬼怪工程。
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