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经营范围
发明名称
Downhole packer
摘要
申请公布号
GB9416687(D0)
申请公布日期
1994.10.12
申请号
GB19940016687
申请日期
1994.08.18
申请人
NODECO LIMITED
发明人
分类号
E21B33/1295
主分类号
E21B33/1295
代理机构
代理人
主权项
地址
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