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经营范围
发明名称
A Hydraulic Drilling Rig
摘要
申请公布号
GB2033943(A)
申请公布日期
1980.05.29
申请号
GB19790034708
申请日期
1979.10.05
申请人
HYDRAULIC DRILLING EQUIPMENT LTD
发明人
分类号
E21B3/02;E21B7/02;E21B19/084;(IPC1-7):E21B7/02
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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