epicycloidsBNC²³⁶²¹³⁺¹ 基本例句 n.数圆外旋轮线；外摆线原型epicycloid的复数 The position relation between cutter and swing deck, wheel blank is analyzed according to forming mechanism of epicycloids. cutting coordinate system is also built. 根据延伸外摆线的形成原理分析刀盘与轮坯间的相对位置关系建立切齿坐标系； boshuo