Precision steel collar made of high quality Gcr15 bearing steel material,roundness, parallelism 0.01 mm
Precision steel collar, high surface finish, good wear resistance, good heatdissipation, long service life, can reduce hairiness, improve yarn quality.
来源：【金诚卓-钢领钢丝圈】 发布时间：发布时间：2018-08-11
