第三大供给来源自黄金回收：首饰商按金属价值卖给金贩子。
The third main source of supply is scrap: jewellery sold to dealers for the value of the metal.
Puckett说，回收商销售从电子设备中清除出的金属而从中获利，但是找出有用的金属的工艺过程是非常有害的。
Recyclers can make money from selling scavenged metal from electronic equipment, says Puckett, but the process to retrieve usable metals is typically extremely toxic.
HKS的核心业务是有色金属和非有色金属废料的回收，世界各地的金属生产商创造高档原料。
The core business of HKS is the recycling of ferrous and non-ferrous scrap to create high grade raw materials for metal producers all over the world.
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