Biplane Military Aircraft:-- br The Stearman Model 75 is a biplane formerly used as a military trainer aircraft, of which at least 10,626 were built in the United States during the 1930s and 1940s. Stearman Aircraft became a subsidiary of Boeing in 1934. br br 双翼教练机:-- br 波音斯蒂尔曼七十五型是一种双翼飞机, 以前用作军用教练机, 其中至少 10,626 架是在一九三十年代和一九四十年代在美国制造的, 一九三十四年, 斯蒂尔曼飞机公司成为波音公司的子公司.