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经营范围
发明名称
Well packer
摘要
申请公布号
US2649916(A)
申请公布日期
1953.08.25
申请号
US19510248071
申请日期
1951.09.24
申请人
BROWN CICERO C
发明人
BROWN CICERO C.
分类号
E21B33/122
主分类号
E21B33/122
代理机构
代理人
主权项
地址
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