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经营范围
发明名称
Liner valve with externally mounted perforation charges
摘要
申请公布号
GB9522199(D0)
申请公布日期
1996.01.03
申请号
GB19950022199
申请日期
1995.10.30
申请人
BAKER HUGHES INCORPORATED
发明人
分类号
E21B43/11;E21B43/116
主分类号
E21B43/11
代理机构
代理人
主权项
地址
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