Rectangle blade with four functional cutting edges is very durable 剪切角可调，减少板料扭曲变形。
2.
It was also found the main direction of permeability rotated after shearing and the permeability decreased with the increasing of shearing angle . the excellent prediction of shearing permeability by the lai - young model provided theoretical support for the numerical filling simulations in complex parts 实验研究了剪切变形对纤维织物渗透率的影响，发现剪切变形后主渗透率方向发生旋转，主渗透率值随剪切角增加而降低。
