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公开(公告)号：US2651369A
公开(公告)日：1953-09-08
申请号：US27327852
申请日：1952-02-25
Applicant: STANDARD OIL DEV CO
Inventor： ABENDROTH GUSS F , TAUSCH GILBERT H , WARD III JEREMIAH
IPC: E21B43/04
CPC classification number: E21B43/04
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