n.螺旋面，蜗牛式旋壳...

The ortho cone helicoid was used interrsect intercept by the ortho cone helicoid and the cylinder.正圆锥螺旋面是正圆柱螺旋面被同轴正圆锥面截得.The surface obtained when every point on the edge generates an involute is called helicoid.表面获得了在边缘...

helicoid的音标：helicoid的英式发音音标为：['helɪkɔɪd]helicoid的美式发音音标为：['helɪˌkɔɪd]...