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公开(公告)号：US2841533A
公开(公告)日：1958-07-01
申请号：US45168854
申请日：1954-08-23
Applicant: SHELL DEV
Inventor： BRYANT MATTHEWS JOHN , JOHN CLAYFIELD ERIC , VINCENT WHITTAM THOMAS
CPC classification number: G01N19/04 , G01N25/48 , G01N33/2888
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