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公开(公告)号：FR2278652A1
公开(公告)日：1976-02-13
申请号：FR7519823
申请日：1975-06-19
Applicant: IBM
Inventor： NUFER ROBERT WOLFF , HAI GERALD F
IPC: C04B33/30 , C04B35/111 , C04B35/622 , C04B35/634 , C04B41/20
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