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发明名称
Removable bottom hole choke
摘要
申请公布号
US2353652(A)
申请公布日期
1944.07.18
申请号
US19420439798
申请日期
1942.04.20
申请人
PRODUCTION SUPPLY COMPANY
发明人
COONROD PAUL
分类号
E21B23/00;E21B34/08
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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