High-pure copper mainly comes from copper electrorefining. 高纯铜主要来源于铜的电解精炼。
Bronze has a higher strength than pure copper, is easily cast, has improved machinability, and is very easily joined by soldering or brazing. 青铜比纯铜强度更高，易于铸造，具有改良的机械加工性，易于采用焊接或铜焊进行连接。
