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发明名称
Method of surveying boreholes and locating tools therein
摘要
申请公布号
US2266623(A)
申请公布日期
1941.12.16
申请号
US19380229902
申请日期
1938.09.14
申请人
SPERRY-SUN WELL SURVEYING COMPANY
发明人
GURASICH STEVEN W.
分类号
E21B47/04
主分类号
E21B47/04
代理机构
代理人
主权项
地址
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