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公开(公告)号：US3005942A
公开(公告)日：1961-10-24
申请号：US49525355
申请日：1955-03-16
Applicant: LEESONA CORP
Inventor： PERDREAUX JR RENE J , STANLEY WALLACK
IPC: G21H1/02
CPC classification number: G21H1/02
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