A: (1) center center through the single layer should be arranged in the same sector of the center line, if they can not guarantee this requirement, on-line core bending, the single will be stretched or compressed, resulting in single uplift, leading to fan core line shape changes.
(2) slip requirements: the fan-shaped peripheral single layer should be able to slide in the center, which is wrapped in insulation due to post-yi fan lines, cable core without the mountain of back twisting, single-seek around the periphery of the center plane of sliding therefore, if can not meet this requirement, the same production-line jump, destroy the shape of fan-shaped lines.