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发明名称
APPARATUS FOR MEASURING THE MICROOSCILLATIONS CHANGING IN UNDER EARTH WATER LEVEL
摘要
申请公布号
BG31731(A1)
申请公布日期
1982.03.15
申请号
BG19810050671
申请日期
1981.02.05
申请人
VUTKOV,VASIL G.;NENKOV,NIKOLAJJ D.;DEMIREV,ANASTAS T.
发明人
VUTKOV,VASIL G.;NENKOV,NIKOLAJJ D.;DEMIREV,ANASTAS T.
分类号
E21B47/04;G01F11/00;(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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