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公开(公告)号：US3020149A
公开(公告)日：1962-02-06
申请号：US80507059
申请日：1959-04-08
Applicant: LITTLE INC A
Inventor： SCOTT OLD BRUCE , WARREN HYDE RICHARD , MEISSNER HERMAN P , MARGOLIN STANLEY V , SCHORA JR FRANK C
IPC: C21B13/00
CPC classification number: C21B13/0033 , Y02P10/136
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