摘要
把单参数曲面族的包络面问题转化为初等函数的计算问题，由此而导出的计算方法数学概念严谨，计算手续简捷，工程实用性强，便于实际工作者掌握．
In this paper the problem of the envelope in the single parameter curved surface family was changed quite ingeniously into the one of the calculation by primary function. And the calculation method conducted from it is very rigorous in mathematical concept,and its procedures are simple and direct,its practical application in engineering is very convenient,and so it is easy for practical workers to grasp.
