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APPARAT FOR TESTING AV JORDFORMASJONER.

申请公布号:NO823378(A)

申请号:NO19820003378

申请日期:1982.10.08

申请公布日期:1983.04.11

申请人:
DRESSER INDUSTRIES INC.,

发明人:WILSON, HERBERT CLARK,

分类号:E21B49/10;(IPC1-7):E21B/;G01N/

主分类号:E21B49/10

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