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公开(公告)号：US2550104A
公开(公告)日：1951-04-24
申请号：US72444047
申请日：1947-01-25
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： ALLBERT EUGENE F
IPC: B65H23/06
CPC classification number: B65H23/063 , Y10T307/691
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