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公开(公告)号：US2137863A
公开(公告)日：1938-11-22
申请号：US17234837
申请日：1937-11-02
Applicant: VANADIUM CORP OF AMERICA
Inventor： JEROME STRAUSS , NORRIS GEORGE L
IPC: C21C7/06
CPC classification number: C21C7/06
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