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经营范围
发明名称
Borehole pumping apparatus and safety valve
摘要
申请公布号
GB2337779(A)
申请公布日期
1999.12.01
申请号
GB19990012203
申请日期
1999.05.25
申请人
PHILIP * HEAD
发明人
PHILIP * HEAD
分类号
E21B23/02;E21B33/04;E21B34/06;E21B43/12;(IPC1-7):E21B43/12
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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