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公开(公告)号：US2922638A
公开(公告)日：1960-01-26
申请号：US58994556
申请日：1956-06-07
Applicant: RADO CORP
Inventor： SMITH SAMUEL H
IPC: E05F15/16
CPC classification number: E05F15/67 , E05Y2201/434 , E05Y2201/722 , E05Y2600/46 , E05Y2900/106 , Y10T74/18808
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