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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.这是一个真实描写了两个男女在恶作剧中交叉的人生的“女性方面”的故事。以前的电视剧都算白看了，什么非洲巫师，能打得过我们华夏一个土匪头子吗？那个紫月剑就是在瞎写，《天河魔剑录》就是在瞎拍。When a user opens a contact, an embedded DDE payload is executed.孙家是很普通的人家，有两个女儿，姐姐孙丽是父母的掌上明珠，又漂亮又聪明，大学外语系毕业后在一家旅行社工作；妹妹孙燕模样不如姐姐，也没上过大学，只是在工厂食堂卖卖饭票。孙燕十分羡慕姐姐，觉得自己什么都不如姐姐，经常觉得自卑。可是最近姐姐也有苦恼的事：她一直爱着同院从小一起长大的英俊潇酒的马黎明，再人青梅竹马，早就不是一般的关系，可是她又抗拒不了研究员张波的追求，觉得尽管张波没有马黎明那么让她真的动心，但文化水平高，事业上有建树，对自己将来的发展有帮助，稳妥可靠。而马黎明只是一个普通国营工厂的采购员……她心情矛盾地同时维持着和两个人