Gold can be extracted in the following waste products. One is the motherboard and memory barrier of the waste computer, the other is the electroplating waste commemorative medal in the electroplating plant, and the third is the recycling of old gold jewelry of second -hand second -hand.
Gold can be extracted in the following waste products. One is the motherboard and memory barrier of the waste computer, the other is the electroplating waste commemorative medal in the electroplating plant, and the third is the recycling of old gold jewelry of second -hand second -hand.