copper plated ring
... copper plated sash chain 门窗用镀铜吊链 copper plated ring 镀铜环 Copper plated zinc 铜镀锌 ...
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镀紫铜铁吊环螺钉 copper-plated iron screw ring ; plated iron screw ring
镀铜层、涂环氧树脂 epoxy coated
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