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经营范围
发明名称
Improvements in or relating to electrically fired borehole guns
摘要
申请公布号
GB533465(A)
申请公布日期
1941.02.13
申请号
GB19390029574
申请日期
1939.11.07
申请人
STANDARD OIL DEVELOPMENT COMPANY
发明人
分类号
E21B43/116;F42D1/05
主分类号
E21B43/116
代理机构
代理人
主权项
地址
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