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公开(公告)号：US3149490A
公开(公告)日：1964-09-22
申请号：US76621258
申请日：1958-10-09
Applicant: TEXACO INC
Inventor： CLEMENTS ROY J , EVANS LEON M , HAVLIK JOHN J , TOWELL BILLY H
CPC classification number: G01V11/002 , E21B47/011 , E21B47/124
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