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The outer surface is plated with copper, and the raw material of the core wire is mainly aluminum. The outer surface is scraped and the aluminum core is silvery white. The quotation per unit of aluminum is about 1/4 of that of copper, and the same volume of aluminum is only 1/3 of that of copper, so the quotation per unit of copper clad aluminum is much cheaper than that of oxygen-free copper. Copper-clad aluminum has poor oxidation resistance, faster oxidation speed in humid environment, and poor tortuosity resistance of aluminum raw materials. It is not suitable for laying in the wall, and is only suitable for customers who do not have high demand for network stability or may temporarily establish a network.老鳖这才点点头。一张俏脸梨花带雨之后的楚楚可怜，又有着几分要桃花绽放般的红晕……灯影之下，美人侧卧，格外的美艳，楚楚动人。该剧讲述女主黑木彩因要结婚而提出辞职的当天未婚夫反悔，女主的毒舌上司宇佐美博人（#伊势谷友介#饰）提出“半年不结婚就开除”的复职条件，故事就此展开……这是一个东京男子20年间的故事。 从千叶县浦安的老家来到东京都内著名私立大学就读的佐东翔太，在得知女朋友与比自己大的有钱男人在一起玩后，发誓要在东京更上一层楼，并说出“女人到底就是为了钱”的话。 毕业后，翔太进入一流商社就职，过上了事业爱情两丰收的生活。但是人到中年，翔太在和勤奋工作的同期生小岛的事业之争中落败，又和希望结婚对象年收入超过3000万的恋人南分手，他的观念才由此发生了改变。翔太与高中同学、现任风险投资企业的CEO一马重逢，选择放弃稳定的高薪投身创业。在此期间又与琉璃子相互扶持产生了感情，两人从同事变成了恋人，翔太重新认识了在东京生活的意义。一边为财富、事业和爱情奋斗一边长大，翔太最终找到了自己人生的方向。The detection of time relay mainly includes contact normal detection, coil detection and coil energization detection.