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发明名称
Well bailer
摘要
申请公布号
US2333305(A)
申请公布日期
1943.11.02
申请号
US19410375059
申请日期
1941.01.18
申请人
ECKERT FELIX H
发明人
ECKERT FELIX H.
分类号
E21B27/00
主分类号
E21B27/00
代理机构
代理人
主权项
地址
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