There are also two roller straightening machine, relying on two rollers (Concave Intermediate, hyperbolic roll) the perspective of the different changes in the diameter of the material straightening.
也有两辊矫直机，依靠两辊(中间内凹，双曲线辊)的角度变化对不同直径的材料进行矫直。
2
By means of intermediate image immersing technology, the present invention has increased reflection Angle, reduced straight collimator core diameter and shortened straight collimator length.
本发明是借助中间像浸没的技术，增大反射角、减小直光管芯径，缩短直光管的长度。
3
The current standard mainly establishes at the aim of short intermediate pile, the design method of the long and large diameter bored piles is less targeted and its applicability is not wide.