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公开(公告)号：US2607221A
公开(公告)日：1952-08-19
申请号：US67078246
申请日：1946-05-18
Applicant: UNION OIL CO
Inventor： BABSON EDMUND C , ORMSBY RICHARD R , TURNER MARSHALL C
IPC: G01F1/10
CPC classification number: G01F1/106
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