RE: 淘金这事，我也干过(四) ——首饰加工之模具、机械加工

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淘金这事，我也干过(四) ——首饰加工之模具、机械加工

in gold •  7 years ago 

想起以前我们那边淘金热的时候，各种酸到处可以买到。还自己买了盐酸和硝酸配过王水，不过没有配成功。

gold
7 years ago by

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      ·  7 years ago 

    不会吧，那么牛！~我是新人，帮我点个赞，大牛，谢谢了

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        ·  7 years ago 

      👍

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