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公开(公告)号：US2859753A
公开(公告)日：1958-11-11
申请号：US57333756
申请日：1956-03-23
Applicant: RAND DEV CORP
Inventor： HITCHCOCK JR REUBEN , CARDON SAMUEL Z , ALVORD EARL T
IPC: A24B15/28
CPC classification number: A24B15/28
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