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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.匈奴士兵深受震撼，冒顿也是暗暗心惊。西元一九九三年，大陆西安一处发掘古物的墓穴中，记载当年寻不死药的古画出土。特技演员烈风（方中信饰）与朋友同赴西安旅游，却意外地於古墓中重逢二十年前的救命恩人步荆红（王菲饰演），惊觉其容颜青春美丽一如往昔，从此念念不忘…… 荆红乃入墓盗画者，画中清晰可见秦舞姬胭脂容貌，而荆红与画中胭脂，竟是分毫不差，一模一样。自殺悲願 山崎努 渡辺いっけいHowever, this method has great limitations. XMLHttpRequest requests are usually used for asynchronous refresh of local pages in Ajax methods. Not all requests are suitable to be initiated by this class, and the pages obtained through this class of requests cannot be recorded by browsers, thus carrying out operations such as forward, backward, refresh and collection, which brings inconvenience to users. In addition, for legacy systems that do not have CSRF protection, to use this method to protect, to change all requests to XMLHttpRequest requests, this is almost to rewrite the entire website, which is undoubtedly unacceptable.黄豆听了一振，忙到：走，咱们换个地方说。Cast: insider全盛时代