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다국어입력
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Hyun Tae Kim, Dae Gee Hun, Se Joon Kim, Won Mo Su, | 한국암반공학회 | 2004 ,
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H B Chae,J H Kim and S C Yang, | 대한용접학회 | 2001 ,
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US Department of Education [, ]
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Carfax Publishing Company [, ]
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