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公开(公告)号：US2552458A
公开(公告)日：1951-05-08
申请号：US534448
申请日：1948-01-30
Applicant: RCA CORP
Inventor： REISKIND HILLEL I , LONGACRE GEORGE W
CPC classification number: B29C43/04 , B29C43/56 , Y10S425/81 , Y10T292/0828 , Y10T292/0929 , Y10T292/0959
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