http://sshong.com/2010/06/29/%ec%84%b1%ea%b3%b5%ea%b3%bc-%ec%8b%a4%ed%8c%a8%eb%a5%bc-%ea%b2%b0%ec%a0%95%ed%95%98%eb%8a%94-1-%ec%8b%9c%ea%b0%84%ea%b4%80%eb%a6%ac-%eb%b0%a9%eb%b2%95-%ea%b9%80%ec%a7%80%ed%98%84oojoo%ec%a0%80/
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