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发明名称
WELL PACKER
摘要
申请公布号
CA845479(A)
申请公布日期
1970.06.30
申请号
CAD845479
申请日期
申请人
CAMCO
发明人
JAMES H. CURRENT;HARRY C. EHLERT
分类号
主分类号
代理机构
代理人
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地址
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