In this paper base tangentlength is put forward and lead angle calculating formula is deduced.
这篇文章提出了公法线长度并推导出超前角的计算公式。
2
This paper presents two kinds of new methods for setting out circular curve: free angle and tangentlength method.
介绍了测设和检验圆曲线的两种新方法：任意角夹角法和任意切线长支距法。
3
In this paper calculating method of lead angle of helical gear by measuring span length of length bar and base tangentlength is put forward and lead angle calculating formula is deducel.