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公开(公告)号：US2722639A
公开(公告)日：1955-11-01
申请号：US32207452
申请日：1952-11-22
Applicant: GEN ELECTRIC
Inventor： SHAAD GEORGE E , BECK CHARLES D , GRESHAM JOHN C
IPC: B65H23/18
CPC classification number: B65H23/1806 , B65H23/1813
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