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发明名称
Casing joint
摘要
申请公布号
US2211179(A)
申请公布日期
1940.08.13
申请号
US19380240026
申请日期
1938.11.12
申请人
HYDRIL COMPANY OF CALIFORNIA
发明人
STONE ALBERT L.
分类号
E21B17/042;F16L15/06
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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