Recovery Silver And Gold From Smartphone Components | 从智能手机组件中回收银和金

This video is for demonstration. The acids used is very dangerous and may harming wildlife and human populations
I deeply grateful to Mr. STEVEN WONG CHEE YEW for his invaluable support in advancing the materials.
此视频仅供演示。所用的酸非常危险，可能会危害野生动物和人类
我深深感谢黄志义先生对推进这些材料的宝贵支持。