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公开(公告)号：US2528279A
公开(公告)日：1950-10-31
申请号：US62325445
申请日：1945-10-19
Applicant: ARMOUR RES FOUND
Inventor： LEEDY HALDON A , MARVIN CAMRAS
IPC: G11B5/86
CPC classification number: G11B5/86
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