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公开(公告)号：US3314476A
公开(公告)日：1967-04-18
申请号：US33370463
申请日：1963-12-26
Applicant: TEXACO INC
Inventor： STAPLES DALLAS R , ALLEN JOSEPH C
IPC: E21B43/16 , E21B43/243
CPC classification number: E21B43/243 , E21B43/16
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