line rule meaning in English

线路维护规程

Iron - nickel alloy 4j58 of permanent expansion for line rules
线纹尺用定膨胀铁镍合金4j58
The direction in which interior lines rules are drawn in the grid horizontal , vertical , both , or neither
在网格中绘制内部行（规则）的方向（水平、垂直、两者或无）。
The direction in which interior lines rules are drawn in the list horizontal , vertical , both , or neither
在列表中绘制内部线（规则）的方向（水平、垂直、两者或无）。
This paper explorates the method of nonlinear approximate equation root of " secant line rule " in theory , and disusses two vertexes of secant line rule and one vertex of secant line rule with two kinds of different thought methods and in order to clear some suspicions of learners , which is used as a reference
现对“割线法”求解非线性方程近似根的方法，从理论上进行了探讨，并用两种不同的思维方式双点割线法和单点割线法进行讨论，来澄清学习者的一些疑惑，以供参考。