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发明名称
Well washing device
摘要
申请公布号
US2212491(A)
申请公布日期
1940.08.27
申请号
US19390292524
申请日期
1939.08.29
申请人
APPLEBY PETER W
发明人
APPLEBY PETER W.
分类号
E21B37/00
主分类号
E21B37/00
代理机构
代理人
主权项
地址
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