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发明名称
Methods and apparatus for sealing a bore hole casing
摘要
申请公布号
US2707997(A)
申请公布日期
1955.05.10
申请号
US19520285201
申请日期
1952.04.30
申请人
ZANDMER
发明人
ZANDMER SOLIS MYRON;JACOBS ALBERT JOSEPH
分类号
E21B33/14;E21B43/11
主分类号
E21B33/14
代理机构
代理人
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地址
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