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公开(公告)号：US3374619A
公开(公告)日：1968-03-26
申请号：US54572666
申请日：1966-04-27
Applicant: UNITED STATES STEEL CORP
Inventor： ADAMS WILLIAM E , LUCHT WILBERT A
IPC: D07B1/06
CPC classification number: D07B1/068 , D07B2201/1064 , D07B2401/2015
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