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发明名称
Method for electrically investigating subterranean strata
摘要
申请公布号
US2114056(A)
申请公布日期
1938.04.12
申请号
US19350029228
申请日期
1935.07.01
申请人
ELLIOTT CORE DRILLING COMPANY
发明人
LOHMAN RALPH W.
分类号
G01V3/24
主分类号
G01V3/24
代理机构
代理人
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地址
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