相对极小 meaning in English

relative minimum

Secondly , to counter contour curve for large sole of rubber overshoes , the way of linear circle arc spline of two dimensions curve fitting has been raised in this paper and autocad has meanwhile been applied in cad / cam integeration system of rubber overshoes mould , and also a whole set of software and hardware technique developed , and the selecting way for optimizing tool path worked out . this way may make nc machining free running minimun
其次，针对胶鞋大底的轮廓曲线，对圆弧样条进行了深入研究，提出了二维曲线拟合的线性化圆弧样条方法；同时将autocad应用于胶鞋模具cad / cam一体化系统中，成功地开发了一整套相应的软硬件应用技术，提出了刀具轨迹优化的动态选择法，以便使nc加工的空行程相对极小化。