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发明名称
Apparatus for drilling boreholes
摘要
申请公布号
US3185224(A)
申请公布日期
1965.05.25
申请号
US19630283173
申请日期
1963.05.27
申请人
ESSO PRODUCTION RESEARCH COMPANY
发明人
JR. LEON H. ROBINSON,
分类号
E21B7/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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