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经营范围
发明名称
Method and apparatus for surveying wells
摘要
申请公布号
GB546655(A)
申请公布日期
1942.07.23
申请号
GB19410001320
申请日期
1941.01.31
申请人
SPERRY-SUN WELL SURVEYING COMPANY
发明人
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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