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公开(公告)号：US2761176A
公开(公告)日：1956-09-04
申请号：US42139254
申请日：1954-04-06
Applicant: KENRO CORP
Inventor： WELCH KENNETH B , SACIA ROGER R
CPC classification number: B29B13/10 , B29B11/00 , B44F5/00 , B44F9/04 , Y10T428/252
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