Legal relationship of aviation has axis position, it penetrates all contents of jurisprudence of aviation just as one red line. This text analyses and studis conception; 航空法律关系在整个航空法学中处于轴心地位,贯穿航空法学的全部内容。
Taking seat to displacement, the bending moment, force of axis, this text made the research respectively, found out its controlling point, controlling section and its rule of changing. 对位移、弯矩、轴力分别做了研究,给出了其控制点、控制截面及其变化规律。