任意角度弯头展开公式序号01234567101112131415161718192021222324L=tanβ(r*cosθ+R)请在黄色方框输入相对数值β圆周等分rR151515151515151515151515151515151515151515151515151212121212121212121212121212121212121212121212121225.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.425.438.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.138.1L1716141074347101416171614107434710141617228
