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发明名称
Groundwater direction determination
摘要
申请公布号
US2986639(A)
申请公布日期
1961.05.30
申请号
US19570655115
申请日期
1957.04.25
申请人
UNION OIL COMPANY OF CALIFORNIA
发明人
JOSENDAL VIRGIL A.;STEGEMEIER RICHARD J.
分类号
E21B47/10
主分类号
E21B47/10
代理机构
代理人
主权项
地址
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