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1.由弦切角值求圆心方向原理:如图1,由公式:α=L/0.0349R(1)式中:α——弦切角(度); L——弧长(米); R——半径(米)。
1. From the chord cut value to find the center of the circle principle: As shown in Figure 1, by the formula: α = L / 0.0349R (1) Where: α - chord cut angle (degrees); L - arc length R - radius (meters).