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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.Powerful document management在标志性地点的标志性艺术家。这部音乐会电影捕捉到了著名的德国作曲家和制片人尼尔斯·弗拉姆在传奇的柏林芬克斯的几场现场表演。期待从一个伟大的当代音乐家周围飙升的环境和新古典主义钢琴。　　1924年，王剑虹病逝。悲痛万分的瞿秋白第二天就出现在了课堂上。瞿秋白因住处遭到敌人的搜查而被迫转入地下活动，杨之华受组织负责与瞿秋白联系，师生加战友的情谊，渐渐升华。在上海工人运动的大潮中，杨之华勇敢的向瞿秋白表白，后者委婉拒绝了她……FOX宣布续订《哥谭》第四季。可是，当他听说黄豆兄弟几个抱着孩子、牵着狗。Private User user2;