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发明名称
APPARATUS FOR USE IN THE SLANT HOLE DRILLING OF WELL BORES
摘要
申请公布号
GB1249582(A)
申请公布日期
1971.10.13
申请号
GB19690011830
申请日期
1969.03.05
申请人
BYRON JACKSON INC.
发明人
分类号
E21B7/04;E21B7/06;E21B47/024;E21B47/12;G01C9/00;G01C9/12
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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