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Hy solution??(4)?????????

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??? ???????

???? ?? ? ????

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2010.9?
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50?=>30??

???? : 2008.5? ~ 2009.2?

???? �C ?? ??? ???

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Hy solution??(4)?????????

1. ???? ?? ? ????

2. ???? 2010.9? ????: 50?=>30?? ???? : 2008.5? ~ 2009.2?

3. ???? �C ?? ??? ???

4. ???? �C ?? ???

5. ???? �C ????? + ?????