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发明名称
Testing casing heads
摘要
申请公布号
US2478628(A)
申请公布日期
1949.08.09
申请号
US19470724644
申请日期
1947.01.27
申请人
SHELL DEVELOPMENT COMPANY
发明人
HANSEN CHARLES
分类号
E21B33/04
主分类号
E21B33/04
代理机构
代理人
主权项
地址
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