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公开(公告)号：US3372573A
公开(公告)日：1968-03-12
申请号：US34678364
申请日：1964-02-24
Applicant: PHILLIPS PETROLEUM CO
Inventor： SANFORD RICHARD A , CALHOUN JAMES S
IPC: G01N30/20
CPC classification number: G01N30/20
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