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公开(公告)号：EP0437476A4
公开(公告)日：1991-10-30
申请号：EP89911184
申请日：1989-09-27
Applicant: THE SLOPE INDICATOR COMPANY
Inventor： CLEMENTS, DAVID, J.
CPC classification number: G01L1/10 , G01F23/0023 , G01F23/2966 , G01L9/0013 , G01N9/002 , G01N11/16
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