[問題] 請問如何分辨tem銅網的正反面?
如標題
用的銅網是http://tinyurl.com/3deqvyl
在燈光下
一面是比較霧霧.不反光的
另一面比較像金屬反光的樣子 且外圍有一圈特別亮的環
我想知道哪一面是滴sample的面
多謝~~
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