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公开(公告)号:KR102054064B1
公开(公告)日:2019-12-09
申请号:KR1020180033263
申请日:2018-03-22
Applicant: 충남대학교산학협력단
Inventor: 김승균 , 이병주 , 김인래 , 박희태
IPC: B64C33/02 , B65H75/44