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发明名称
DEVICE FOR LEVELLING-OUT PRESSURE FOR FORMATION TESTERS RUM ON PIPES
摘要
申请公布号
SU1592481(A1)
申请公布日期
1990.09.15
申请号
SU19874326479
申请日期
1987.11.13
申请人
VNI PK I GEOFIZ
发明人
BOGOMAZOV VLADIMIR N,SU;RYAZANTSEV NIKOLAJ F,SU
分类号
E21B49/00
主分类号
E21B49/00
代理机构
代理人
主权项
地址
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