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malei902(½ð±Ò+5): 2010-08-27 18:21:36
´ß»¯´óʦ(½ð±Ò+1):ллָµã£¬»¶Ó³£À´´ß»¯°æÌÖÂÛ£¡ 2010-08-26 19:10:55
malei902(½ð±Ò+5): 2010-08-27 18:21:36
| 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 possible due to the type of carbon. |
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njhunter
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3Â¥2010-08-25 15:24:23
4Â¥2010-08-26 15:36:41
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malei902(½ð±Ò+5): 2010-08-27 18:21:31
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