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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.小葱诧异地问道：咋不是去他家，而是去庄子上？板栗道：方伯伯两个儿子从京城回来这边读书。QQ Flying Car Tour Charm Level:　　一次偶然中，罗思拉遇见了一位王子。王子深深的为罗思拉感到着迷，将她带回了自己的城堡。可是，此时国王已经钦点了另一位公主为王子的妻子，而公主的母亲为了获得权利，设计赶走了罗思拉。最终，罗思拉战胜了邪恶回到了王子的身边，同时，她亦回忆起了过去，找到了失散已久的母亲。B. Nasal pinching and inflation examination.《 废柴兄弟》是一部都市职场情景喜剧，由爱奇艺独家出品，尹琪编剧导演、开心麻花的王宁和修睿搭档主演，讲述了一群创业者奋斗的故事。2. Procedures for self-funded business