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公开(公告)号：US2883925A
公开(公告)日：1959-04-28
申请号：US65639857
申请日：1957-05-01
Applicant: UNITED STATES STEEL CORP
Inventor： PRITCHARD JOHN E , STOKES WILLIAM H
IPC: B65B27/06
CPC classification number: B65B27/06
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