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发明名称
DEVICE TO MEASURE MEDIUM PRESSURE IN CASING STRING-BOREHOLE ANNULUS
摘要
申请公布号
SU1680964(A1)
申请公布日期
1991.09.30
申请号
SU19894709259
申请日期
1989.06.23
申请人
VNII NEFTEPROMY GEOFIZ
发明人
BERNSHTEJN DAVID A,SU;BARSKIJ ISAAK M,SU;RAPIN VADIM A,SU
分类号
E21B47/06
主分类号
E21B47/06
代理机构
代理人
主权项
地址
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