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公开(公告)号：US3375490A
公开(公告)日：1968-03-26
申请号：US50829665
申请日：1965-11-17
Applicant: TEXACO INC
Inventor： STUBBLEFIELD STEVEN A , DOUGLAS ROBERT L
IPC: G01V1/20
CPC classification number: G01V1/201
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