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XB-52型轰炸机是波音公司生产的第一架“同温层堡垒”。因为在一次滑行试验中的爆炸事故,所以1952年4月的首次试飞荣誉让YB-52拿去了。
The XB-52 bomber was the first Stratosphere built by Boeing. The YB-52 was taken for the first flight test in April 1952 because of an explosion in a taxi test.