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公开(公告)号：US3220950A
公开(公告)日：1965-11-30
申请号：US24410062
申请日：1962-12-12
Applicant: IBM
Inventor： DI MARCO HENRY A , DORION RICHARD D , LEAYCRAFT EDGAR C
IPC: C04B35/26
CPC classification number: C04B35/2625
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