Instead of using wings, the coleopter employed a circular extension serving as the outer part of the jet engine while helping the aircraft achieve level flight, as well as vertical ascent and landing.
环翼机没有尾翼，而是采用一个延伸的圆形作为外部引擎，帮助飞机完成水平飞行和垂直起飞降落。
This circular curve shape is actually the extension of the hydraulic optimum section in hydraulics to the situation of considering bank stability.
该圆弧形曲线形状实际上是将水力学中的水力最佳断面推广到考虑边坡稳定的情况。
This circular curve shape is actually the extension of the hydraulic optimum section in hydraulics to the situation of considering ban stability.
该圆弧形曲线形状实际上是将水力学中的水力最佳断面推广到考虑边坡稳定的情况。
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