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发明名称
Well head equipment
摘要
申请公布号
US1811422(A)
申请公布日期
1931.06.23
申请号
US19290374113
申请日期
1929.06.27
申请人
BROWN CICERO C
发明人
BROWN CICERO C.
分类号
E21B33/03;E21B34/02
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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