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发明名称
DEVICE FOR DETERMINATION OF WELL DEPTH
摘要
申请公布号
RU2068089(C1)
申请公布日期
1996.10.20
申请号
SU19894755357
申请日期
1989.11.01
申请人
YANCHENKO NIKOLAJ LEONOVICH
发明人
YANCHENKO NIKOLAJ L
分类号
E21B47/04;G01B7/04;(IPC1-7):E21B47/04
主分类号
E21B47/04
代理机构
代理人
主权项
地址
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