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公开(公告)号:KR102060487B1
公开(公告)日:2019-12-30
申请号:KR1020180004231
申请日:2018-01-12
Applicant: 대한민국(부산기계공업고등학교장)
Inventor: 최승락 , 최원준
IPC: B23Q11/10 , B03C1/02