A new formula on the action sphere of reel slat is driven out through the graphical analysis of reel slat motion locus in this paper.
本文利用图解法分析了拨禾轮的运动轨迹，并推导出新的拨禾轮作用范围的公式。
2
A new algorithm for the calculation of the path of wire is discussed. The formula of transformation from machining programs to graphical data is also given.
文中给出了计算钼丝中心轨迹的新算法，归纳了数控加工程序向图形数据转换的计算公式。
3
This paper deduced equation by analyzing strength endured by tubing string, based on formula, taking advantage of graphical method checkout the maxim setting depth and strength.