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公开(公告)号：US2638579A
公开(公告)日：1953-05-12
申请号：US3030748
申请日：1948-06-01
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： DYCHE JR HOWARD E , CARDWELL GILBERT P
IPC: B64D45/00
CPC classification number: B64D43/02
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