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为了配合美国空军对下一代运输机的关注,诺斯罗普·格鲁门公司正在开展飞翼/动力增升短距起降先进运输机的研制,洛克希德·马丁公司则正在制造“先进复合材料货运机”ACCA 飞行试验验证机。
In keeping with the Air Force’s concern for the next generation of transport aircraft, Northrop Grumman is developing advanced aircraft for short-range flight / power take-off and landing, while Lockheed Martin is manufacturing Advanced Composite Material cargo aircraft "ACCA flight test validator.