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发明名称
Tubing head for wells
摘要
申请公布号
US2092261(A)
申请公布日期
1937.09.07
申请号
US19350054356
申请日期
1935.12.14
申请人
RECTOR LAURENCE L
发明人
RECTOR LAURENCE L.
分类号
E21B33/04;E21B34/00;E21B34/02
主分类号
E21B33/04
代理机构
代理人
主权项
地址
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