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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.Conclusion: The page with SingleInstance is initially created with a task stack to this page, and then the pages in this stack are reused all the time. Note that only this mode will create a new stack for the initialized page. The rule of return is to finish the stack where this page is located first, and then finish each page of the next stack.半梦半醒 - 南征北战NZBZ此剧讲述了已经分手的恋人再次伪装成情侣,参加抽奖兑现活动之情侣旅行而展开的感性爱情故事。一个可爱的妻子、一个听话的儿子、一份稳定的工作－－Dan Vassar觉得自己的生活没有什么不满意的。但是生活偏偏要给他开个玩笑——他竟稀里糊涂成了一名时间旅者，他不仅回到了过去，而且还对他人的生活造成了影响。有些人的生活变得更美好了，但是有些则更糟糕了。在时间旅行的过程中，Dan见到了自己过去的未婚妻Livia Beale－－她曾死于一次神秘的飞机坠毁事故。现在，Dan有了现代知识，他能够挽救她吗？这样做对他自己的未来会有什么影响？他现在所拥有的一切是否也将改变？　　《将夜》终将至，花开彼岸天。不管点些什么，都请交给我吧♪