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公开(公告)号：US3049035A
公开(公告)日：1962-08-14
申请号：US77344958
申请日：1958-11-12
Applicant: ICI LTD
Inventor： STANLEY HIRST , CHARLES ASTON WILLIAM
CPC classification number: B21J7/18 , B21C1/003 , B21C37/02 , B21J9/12 , B21K27/02 , Y10T74/18344 , Y10T74/2157
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