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tourmaline

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cosine [¦Èit]
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cosine theta
3Â¥2008-04-27 15:16:47
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zhaiwanjing

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[ Last edited by zhaiwanjing on 2008-4-27 at 15:48 ]
6Â¥2008-04-27 15:47:07
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nucleus01

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7Â¥2008-04-27 15:51:44
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zhl224

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Originally posted by nucleus01 at 2008-4-27 15:51:
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