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发明名称
Drilling equipment
摘要
申请公布号
GB1018950(A)
申请公布日期
1966.02.02
申请号
GB19640009000
申请日期
1964.03.03
申请人
HYDRAULIC DRILLING EQUIPMENT LTD
发明人
PENNEY ROBERT MORTIMER
分类号
E21B7/124;E21B21/00;E21B21/12;E21B25/18
主分类号
E21B7/124
代理机构
代理人
主权项
地址
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