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经营范围
发明名称
Well packer
摘要
申请公布号
US2582530(A)
申请公布日期
1952.01.15
申请号
US19500182790
申请日期
1950.09.01
申请人
IRVEN DAETWILER
发明人
DAETWILER IRVEN
分类号
E21B33/12
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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