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Patent테트라포드

10-2012-0094951 (2012.08.29) / 10-1201685 (2012.11.09)

Patent테트라포드

10-2010-0065993 (2010.07.08) / 10-1241240 (2013.03.04)

Patent휴대용 등표구조물 안전진단장비 및 방법

10-2010-0027784 (2010.03.29) / 10-1151290 (2012.05.23)

Patent수로구조물

30-2008-0037117 (2008.08.27) / 30-0539827 (2009.09.09)

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