... warping head,roll back,Positive tension roller,Damaged Yarn Detector (South Korea) ,Blowing Detector,Automatic oiling ... -uniform off and it will make the waste of yarn to a minimum.2.The preservation of ... braking achieved with the constant tension and the yarn is basically the same.8.Electrical parts ... coated high hardness, high surface finish on the yarn are greatly improved adhesion, positive let-off ...