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发明名称
Well swab
摘要
申请公布号
US2144997(A)
申请公布日期
1939.01.24
申请号
US19360074078
申请日期
1936.04.13
申请人
THE GUIBERSON CORPORATION
发明人
THAHELD FERL A.
分类号
E21B37/10
主分类号
E21B37/10
代理机构
代理人
主权项
地址
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