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公开(公告)号：EP0581858A4
公开(公告)日：1993-12-17
申请号：EP92910940
申请日：1992-04-16
Applicant: BAKER HUGHES INC
Inventor： KIMBELL CHRIS L , HAYMAN ROBERT M , SZINNYEI W JAY
CPC classification number: G01N21/8483 , G01N21/783 , G01N2201/084 , G01N2201/122 , G01N2201/127
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