北京顺鑫成科技有限公司供应代理美国CFW CALIFORNIA FINE WIRE进口电极丝、铂丝、铂铱丝、贵金属丝、不锈钢丝， CFW，镍铬合金丝、铂铱合金丝、钨丝、不锈钢丝,美国加利福尼亚细线公司，

As technology has progressed copper has remained a highly useful element. Although the Copper Development Association reports that 0.7 trillion pounds of copper have been mined throughout history, there are still over five trillion pounds remaining in the earth. According to the May 26, 2007 edition of New Scientist, the earth has an estimated 61 years supply of copper left. Fortunately however, copper has an infinite recyclable life and has one of the highest recycling rates of any other engineering metal. The fact that premium grade scrap has about 95 percent of the value of newly mined metal ensures that this rate remains high. The wire industry uses primarily newly refined copper for its products.