tangent length
切线长度；切线长
tangent───n.(Tangent)（美、印度）坦根特（人名）；n.切线，切面；正切；adj.切线的，相切的；接触的；离题的
length───n.长度，长；时间的长短；<语>音长
externally tangent───外切的
assailant tangent───攻击切线
- the best friendship">line───[数]切线，正切
span length───杆间距离，跨度距离；跨度距离；杆间距离
equal length───[统计]等长；[统计] 等长
back length───后面长度
dress length───衫长
this paper base tangent length 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。
This paper presents two kinds of new methods for setting out circular curve: free angle and tangent length 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。
this paper calculating method of lead angle of helical gear by measuring span length of length bar and base tangent length is put forward and lead angle calculating formula is deducel.───分析齿轮主要参数，提出用测量跨棒（）和公法线长度计算斜齿圆柱齿轮螺旋角的测绘方法，并推导出螺旋角的计算公式。
The Calculation of the Measured Value on the Base Tangent Length and Its Tolerance for the Involute Splines───渐开线花键公法线长度测量值及其公差的计算
Curve Design of Highway Alignment Tangent Length Control───公路路线切线长控制的曲线设计
Measuring the Base tangent length is critical, it is better to use measurement over rolls───测量公法线长度是很重要的，最好是使用量棒间距！
variation quantity of base tangent length───公法线长度变动量