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公开(公告)号：US3383747A
公开(公告)日：1968-05-21
申请号：US47098865
申请日：1965-07-12
Applicant: DONALD M. BROWNE
Inventor： BROWNE DONALD M
CPC classification number: B08B7/022 , B25D2250/291 , Y10T29/4578
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