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公开(公告)号：US3443933A
公开(公告)日：1969-05-13
申请号：US3443933D
申请日：1964-06-11
Applicant: LEESONA CORP
Inventor： BOYHAN MATTHEW B , VENKATESAN PERUVEMBA SWAMINATH
CPC classification number: C22B11/04
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