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公开(公告)号：US2693104A
公开(公告)日：1954-11-02
申请号：US12398549
申请日：1949-10-27
Applicant: STANDARD OIL DEV CO
Inventor： WELGE HENRY J , RAPOPORT LEO A
IPC: G01N15/08
CPC classification number: G01N15/08
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