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发明名称
Method of and apparatus for determining the dip of the earth's substrata
摘要
申请公布号
US2133786(A)
申请公布日期
1938.10.18
申请号
US19370141362
申请日期
1937.05.07
申请人
ENGINEERING LABORATORIES, INC.
发明人
NEUFELD JACOB
分类号
E21B47/026
主分类号
E21B47/026
代理机构
代理人
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