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经营范围
发明名称
Gas anchor
摘要
申请公布号
US3128719(A)
申请公布日期
1964.04.14
申请号
US19610108113
申请日期
1961.05.05
申请人
SHELL OIL COMPANY
发明人
JONGBLOED LODEWIJK J. SCHMIT;VOS EDUARD A.
分类号
E21B43/38
主分类号
E21B43/38
代理机构
代理人
主权项
地址
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