The paper has calculated equation of the generatingcurve of minimal surface of revolution by the approach of analysing.
用分析的方法导出了极小旋转曲面的生成曲线的方程。
2
When calculating, only function of the longitudinal generatingcurve of the revoluted curved surface and the value of the projecting angle are needed to be substituted into these formulas.
这些公式的运用很简便，只常将回转曲面的纵母线函数及投射角的值代入即可。
3
In this paper, gas generating strength of propellant charge was studied on basis of retreating for bore pressure time curve, and physical firing law of propellant charge was analysised.