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经营范围
发明名称
Well control head
摘要
申请公布号
US2387610(A)
申请公布日期
1945.10.23
申请号
US19410423212
申请日期
1941.12.16
申请人
ROACH EDMUND J;COOKE JR EDWARD F
发明人
ROACH EDMUND J.;JR. EDWARD F. COOKE,
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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