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经营范围
发明名称
Borehole plug
摘要
申请公布号
GB2245916(B)
申请公布日期
1994.03.30
申请号
GB19910014847
申请日期
1991.07.10
申请人
ALAN GERARD * VASEY
发明人
ALAN GERARD * VASEY
分类号
E21B33/12;E21B33/128;E21B33/134;(IPC1-7):E21B33/128
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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