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发明名称
Casing bridging device
摘要
申请公布号
US2275936(A)
申请公布日期
1942.03.10
申请号
US19400343584
申请日期
1940.07.02
申请人
BAKER OIL TOOLS, INC.
发明人
BAKER REUBEN C.
分类号
E21B33/134
主分类号
E21B33/134
代理机构
代理人
主权项
地址
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