본문

Multilingual
1
Yeonjun Choo , Baseon Kang, | 대한기계학회 | 2004 ,
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Chang-Sung Seok, Bong-Kook Bae, Jae-Mean Koo, | 대한기계학회 | 2004 ,
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2
US Department of Education [, ]
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US Department of Education [, ]