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The outer surface is plated with oxygen-free copper, and the raw materials of the core wire are brass, bronze and miscellaneous copper. Because the raw materials of copper inside and outside are different, it is called copper clad copper. The quotation is moderate, and the quotation for miscellaneous copper is usually only half or lower than that for oxygen-free copper. The produced wire is attributed to non-standard wire, and its anti-twisting and anti-oxidation functions are better than those of copper-clad aluminum. Suitable for induction and wiring engineering with low accounting, it can lay hidden lines in the wall. However, due to the influence of raw materials, the resistance is relatively large, with a 100-meter resistance of 25-35 ohms or even more, and the signal attenuation is very large. It is not so-called all-copper. We pay attention to the distinction.《向东是大海》主要讲述1883年宁波三江口沙船和贸易发展初期，因周家超载货物运输途中遇风发生沉船事故，但事出又有因，使船东董家和周家结下了仇恨……瑶儿，你带小凡先走。另一方面，嘉靖深知胡宗宪是被迫降徽王府的，这封书信的字里行间，他竟也品出了这位老臣对明廷，对自己的思念，实是可叹。境界線上のホライズン难得一见的流星雨即将在俄罗斯上空出现，青年男女们兴奋非常，纷纷走上街头见证着历史性的一刻。美丽女孩尤利娅不顾身为军官的父亲的反对，执意和特姆交往。在流星雨来的这天，他们躲在一隅偷欢，却不知莫大的危机正在袭来。一艘外星飞船遭到意外，结果又被俄罗斯空军击中。它在迫降的过程中给莫斯科造成毁灭性的打击，而尤利娅的闺蜜也在灾难中丧生。在此之后，尤利娅和朋友们闯入禁区，遭遇了外星人。阴差阳错，她决定救治受重伤的外星飞行员汉克，而特姆等憎恶外星人带来的灾难，对汉克恨之入骨。他一直拖到一九四九年五月初才坐上去香港的轮船，算得上真正的末班车。没有人知道他在拖什么或等待什么，我想他自己也未必知道，不过是下意识的拖延。不久他就死在香港，死前再没有值得记述的事件或说过的话，他基本没再说话，这没什么可奇怪的，一切都不值一提，他终于走向自己的沉默。