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公开(公告)号：US3083164A
公开(公告)日：1963-03-26
申请号：US85209759
申请日：1959-11-10
Applicant: IBM
Inventor： LEAYCRAFT EDGAR C , MORRIS JR GEORGE H
IPC: C04B35/26
CPC classification number: C04B35/26 , C04B35/265
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