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公开(公告)号：US3305153A
公开(公告)日：1967-02-21
申请号：US43314265
申请日：1965-02-16
Applicant: ASEA AB
Inventor： OLOF KEDING , HERBERT ERIKSSON , HUGO FRODIN
IPC: B65H23/02 , B65H23/025 , D06C3/06 , D21F1/36
CPC classification number: B65H23/022 , B65H23/0258 , D06C3/067 , D21F1/365
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