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经营范围
发明名称
Sealing means for well packers
摘要
申请公布号
US2632515(A)
申请公布日期
1953.03.24
申请号
US19490076318
申请日期
1949.02.14
申请人
BREAUX NEIL T
发明人
BREAUX NEIL T.
分类号
E21B33/129
主分类号
E21B33/129
代理机构
代理人
主权项
地址
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