绿色螺旋线由内部每一个正方形和四分之一圆相切线构成，而红色的螺旋线是黄金螺旋线，它是对数螺旋线的一种特殊类型。
The green spiral is made from quarter-circles tangent to the interior of each square, while the red spiral is a Golden spiral, a special type of logarithmic spiral.
高速飞剪的定长切头控制是热板坯剪切线中需要解决的课题之一，本文着重介绍了定长切头的意义、控制思想及控制方案，并对部分参数进行模拟计算。
The control of fixed length cutter for high speed flying shear with double rollers is one of the problems which is needed to solve in the processing line for cutting hot plate blank.
高速飞剪的定长切头控制是热板坯剪切线中需要解决的课题之一，本文着重介绍了定长切头的意义、控制思想及控制方案，并对部分参数进行模拟计算。
To solve problem what hot sliced-head can depart fleetly from hot-mile product line, this paper has designed transporting device about hot saw sliced-head by means of mechanical system design method.
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