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公开(公告)号：US3165779A
公开(公告)日：1965-01-19
申请号：US19040762
申请日：1962-04-26
Applicant: PERFECT CIRCLE CORP
Inventor： TEETOR HERMAN C , DAVID TEETOR
IPC: A22C25/02
CPC classification number: A22C25/02
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