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发明名称
ABOVE-BIT PROTECTION MEMBER
摘要
申请公布号
SU840274(A1)
申请公布日期
1981.06.23
申请号
SU19772456719
申请日期
1977.03.01
申请人
SEVERO-KAVKAZSKIJ G NAUCHNO- I PI NEFTYANOJ PROMYSHLENNOSTI
发明人
ANDRIANOV IGOR I,SU;ZUBAREV ALEKSANDR V,SU;PORADA ANATOLIJ S,SU;PARKHOMENKO VIKTOR F,SU
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
代理机构
代理人
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