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公开(公告)号：US2878809A
公开(公告)日：1959-03-24
申请号：US71081058
申请日：1958-01-23
Applicant: RICHARDS MFG COMPANY
Inventor： TREACE HARRY T
CPC classification number: A61B17/1679 , A61B17/1631 , A61B2017/2904 , A61F11/004 , Y10S408/714 , Y10T408/665 , Y10T408/907
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