7 . less requirement for grinding bearing , all the bearings that not hardening and tempering could be used , accordingly reduce some difficulties about machining accessories 7对于磨轴的硬度要求低，末经调质处理的轴都可使用，从而降低了相关零件的加工难度。
Material for needle . the material for meedle of card clothing is of the special steel bright wire , hardened and tempered and rest - proof . this wire we use has ample elasticity and strong tensile strenth 钢针的材料为特种钢丝，表面防锈处理，起一定防锈能力、本身富有弹性和强力，可充分发挥分梳纤维作用。
