欧美一级特黄AAAAAA片换脸,欧美一区二区在线,欧美一级纯片免费安全在线看,欧美黑几把操

News

News

Location: Home > News > News

What is pure copper?

Time:2016-06-02 18:49:47 Source:江西保太集團-江西保太有色金屬集團有限公司 View Rate:9444

Summary:
Pure copper is rose red metal, which is purple after the surface forms a copper oxide film. Therefore, industrial pure copper is often called copper or electrolytic copper. The density is 8-9 g/cm3 and the melting point is 1083 °C. Pure copper has good conductivity and is widely used in the manufacture of wires, cables, brushes, etc.; it has good thermal conductivity and is commonly used to manufacture magnetic instruments and instruments that require anti-magnetic interference, such as compasses, aviation instruments, etc.; plasticity is excellent, easy to heat Pressure and cold pressure processing, can be made into tubes, rods, wires, strips, strips, plates, foils and other copper. Pure copper products are available in both smelted and processed products.
欧美一级特黄AAAAAA片换脸,欧美一区二区在线,欧美一级纯片免费安全在线看,欧美黑几把操