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Originally posted by americanyk at 2010-08-26 17:23:37:
There are several possible reasons. Fistly, if you use strongly mineral acid. It is possinle to change the suface, even the channels. Secondly, it is possible for the loss of water. Thirdly, it is  ...

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malei902(½ð±Ò+5):лл 2010-08-27 18:21:14
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