copper rivet的意思|示意

Each copper rivet on all Special saddle models is carefully hand hammered by skilled craftsmen.

车座的每个型号都有高级技师特别小心的手工锤制铜铆钉。

What's the middle copper rivet for? But some spearhead is made all by iron?

中间的铜铆是何用途?可有些枪头又完全是铁造?。

Precision spring(compression/tension/torsion/special-shape/battery spring), USB stainless clockwork spring, copper, iron and aluminum rivet, nail claw/claw pearl, and toy axle.

精密弹簧（压簧、拉簧、扭簧、异形弹簧及电池弹簧等）、USB不锈钢伸缩发条、铜铁铝铆（窝）钉、爪钉/管珠、玩具车轴。