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公开(公告)号：FI22817A
公开(公告)日：1948-04-12
申请号：FI22817D
申请日：1946-02-16
Applicant: STANDARD OIL DEV CO
Inventor： HAVENS HOLT PHILETUS , DUER REEVES EDWAED , WESLEY TYSON CHARLES
IPC: C21B13/02
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