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公开(公告)号：US3476383A
公开(公告)日：1969-11-04
申请号：US3476383D
申请日：1967-08-14
Applicant: IBM
Inventor： WILCOX WILLIAM L , WAGNER RICHARD E
IPC: B65H9/00 , G06K13/077 , B65H29/68 , B65H29/20
CPC classification number: G06K13/077
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