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发明名称
DRILLING ASSEMBLY DEFLECTION APPARATUS
摘要
申请公布号
ZA7407034(B)
申请公布日期
1975.11.26
申请号
ZA19740007034
申请日期
1974.11.01
申请人
CONTINENTAL OIL CO
发明人
EDMOND T;DAHL H;HAWORTH G
分类号
E21B;E21C
主分类号
E21B
代理机构
代理人
主权项
地址
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