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发明名称
Improvements in or relating to a cable tool drill for drilling earth formations
摘要
申请公布号
GB759467(A)
申请公布日期
1956.10.17
申请号
GB19550028077
申请日期
1954.05.21
申请人
RUSTON-BUCYRUS LIMITED
发明人
HUDSON TOM NATHAN
分类号
E21B1/02
主分类号
E21B1/02
代理机构
代理人
主权项
地址
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