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公开(公告)号:KR102093870B1
公开(公告)日:2020-03-27
申请号:KR1020180140768
申请日:2018-11-15
Applicant: 한국도로공사
Inventor: 유병관 , 이경보 , 변이석 , 최동민
IPC: G07B15/06 , G08G1/017