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公开(公告)号：US3340101A
公开(公告)日：1967-09-05
申请号：US44518865
申请日：1965-04-02
Applicant: IBM
Inventor： FIELDS JR DAVIS S , MEHL DANIEL L , ADDIS BERNARD F
IPC: B21D26/055 , C22F1/00 , C22F1/16
CPC classification number: B21D26/055 , C22F1/00 , C22F1/006 , C22F1/165
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