Method of
purchase https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-10058254375.12.WgF3Uk&id=42731084220
Cast zinc alloy precision ball screw M3 orthodontic buckle, inner ball hole 2MM. A small gap. Zinc alloy color. Eight yuan a. It can be used to bridge the steering rod.
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