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经营范围
发明名称
Means for laterally entering subterranean strata and withdrawing the pore content thereof
摘要
申请公布号
US2312805(A)
申请公布日期
1943.03.02
申请号
US19410398836
申请日期
1941.06.19
申请人
DOUGLAS LESLIE A
发明人
DOUGLAS LESLIE A.
分类号
E21B7/06;E21B49/08;E21B49/10
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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