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经营范围
发明名称
WELL SCREEN ASSEMBLY
摘要
申请公布号
IE790478(L)
申请公布日期
1981.01.04
申请号
IE19790000478
申请日期
1979.07.04
申请人
发明人
分类号
E21B43/08;(IPC1-7):E21B43/08
主分类号
E21B43/08
代理机构
代理人
主权项
地址
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