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公开(公告)号:US20180043507A1
公开(公告)日:2018-02-15
申请号:US15557601
申请日:2016-03-25
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor: Tsukio Sato , Naohiro Nagafuchi , Shinji Matsumoto
Abstract: A grinding disc includes an inner layer (20) which is made of grindable material (containing abrasive particles) and an outer layer (20) which covers at least a portion of the surface of the inner layer (50) and which is made of non-grindable material (i.e. not-containing abrasive grain).