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经营范围
发明名称
Well packer
摘要
申请公布号
US2884070(A)
申请公布日期
1959.04.28
申请号
US19550545015
申请日期
1955.11.04
申请人
CICERO C. BROWN
发明人
POTTS ERNEST L.
分类号
E21B33/126
主分类号
E21B33/126
代理机构
代理人
主权项
地址
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