| Name: |
john | | E-Mail: |
john85067760 at yahoo.com | | Location: |
China | | Birth Year: |
1942 | | Gender: |
Male | | Comments: |
I love your website. The humor is great as well as knowledge about your country. | | Fortune: |
Copper occurs in nature mixed with other minerals and valuable metals in ore, and the proportion of copper in the ore can vary considerably. Until fairly recently, the only way to extract pure copper |
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