The first one is pure copper wire with bare, uncoated and alloy-free surface, no oxidation, no wool, and the diameter of copper wire is not less than 1.6 mm.
The second includes clean, colourless, uncoated, tin-free, alloy-free pure copper wire and copper cable, without wool and burnt brittle copper wire.
第三种无合金的废铜线，含有杂料，含铜量为96%（最小含量94%）。不得含有过分铅化和锡化的铜线、焊接过的铜线、黄铜和青铜线、过多的油、废钢铁和非金属、脆的过烧线、绝缘性铜线和过多的细丝线。The third kind of alloy-free scrap copper wire contains impurities with a copper content of 96% (minimum content 94%). No excessive lead and tin copper wires, welded copper wires, brass and bronze wires, excessive oil, scrap steel and non-metal, brittle overburnt wires, insulating copper wires and excessive fine wires shall be included.需用恰当方法清除污垢。各种纯铜废料，首要包含铜材加工厂和铜加工制造厂发生的纯铜的边角料、切头、废次材、半成品、线材、废品等；答应有报废的纯铜裸线和铜管等其它纯铜制品，但不许有水垢、油污、涂层等；废铜猜中不答应含有任何杂质和铜合金，也不许含有毛丝、车屑、磨屑和厚度小于1mm的铜板。Appropriate methods are needed to remove dirt. All kinds of pure copper scraps, including the edge and corner materials, cutting heads, scrap secondary materials, semi-finished products, wires and scraps of pure copper produced by copper processing factories and copper processing factories, promise to have scrap pure copper bare wires and copper pipes and other pure copper products, but do not allow scale, oil stain, coating, etc. No impurities and copper alloys are allowed in waste copper guess, and no wool, scraps, grinding, etc. Chips and copper plates with thickness less than 1 mm.其实他们都叫紫铜，不过商场买卖比较多的那种叫做紫杂铜，铜含量在80%左右，还有黄铜也买卖的比较多的废金属种类，一般的黄铜是59黄铜就是含纯铜59%的，其他的成分以锌为主，这种铜也叫做黄杂铜。In fact, they are all called copper, but the kind that the market sells more is called copper miscellaneous, the content of copper is about 80%, and there are more kinds of scrap metal that the brass also sells. The general brass is 59% of pure copper, and the other components are mainly zinc. This kind of copper is also called brass miscellaneous.