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圆曲线主点计算程序李兴贵（蒲江县水电局）本文应用卡西欧ｆｘ─４ＫＰ可编程计算器讨论渠道国曲线三主点的测设计算．测设时的几何示意图如下。图中，切线长度Ｔ＝ＲｔｇＡ／２曲线长度１＝Ｒ×Ａ×π／１８０°外矢距Ｅ＝ＲＳｅｃＡ／２—Ｒ＝Ｒ（ＳｅｃＡ／２─算例：...
The calculation of the main point of the circular curve Li Xinggui (Pujiang County Hydropower Bureau) This article uses Casio fx ─ 4KP programmable calculators to discuss the calculation of the three main points of the channel countries curve. Geometrical schematic diagram is as follows. In the figure, tangential length T = RtgA / 2 curve length 1 = R × A × π / 180 ° external pitch E = RSecA / 2-R = R (SecA / 2-example: