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Keystone B-3 : ウィキペディア英語版 | Keystone B-3
The Keystone B-3A was a bomber aircraft developed for the United States Army Air Corps in the late 1920s. ==Design and development== It was originally ordered as the LB-10A (a single-tail modification of the Keystone LB-6), but the Army dropped the ''LB-'' 'light bomber' designation in 1930. Although the performance of the B-3A was hardly better than that of the bombers flown at the end of World War I, it had come a long way. In terms of its safety, it was far superior to its oldest predecessors.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Keystone B-3」の詳細全文を読む
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