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经营范围
发明名称
Well surveying instrument
摘要
申请公布号
US2756511(A)
申请公布日期
1956.07.31
申请号
US19510260409
申请日期
1951.12.07
申请人
SUN OIL COMPANY
发明人
YOUNG EINAR T.
分类号
E21B47/00
主分类号
E21B47/00
代理机构
代理人
主权项
地址
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