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发明名称
Sealing assemblies for well packers
摘要
申请公布号
US2720267(A)
申请公布日期
1955.10.11
申请号
US19490132589
申请日期
1949.12.12
申请人
BROWN CICERO C
发明人
BROWN CICERO C.
分类号
E21B33/126;E21B33/128;E21B33/129
主分类号
E21B33/126
代理机构
代理人
主权项
地址
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