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发明名称
Oil well surveying instrument
摘要
申请公布号
US1889114(A)
申请公布日期
1932.11.29
申请号
US19300469217
申请日期
1930.07.19
申请人
SMITH WAYNE M;HALEY KENNETH W
发明人
SMITH WAYNE M.;HALEY KENNETH W.
分类号
E21B47/022
主分类号
E21B47/022
代理机构
代理人
主权项
地址
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