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发明名称
DEVICE FOR WORKING BOTTOM-ADJOINING AREA OF BOREHOLES
摘要
申请公布号
SU912917(A1)
申请公布日期
1982.03.15
申请号
SU19802885631
申请日期
1980.02.20
申请人
PECHORSKIJ GNI PI NEFTYANOJ PROMYSHLENNOSTI
发明人
POPOV ANATOLIJ A,SU;BORISENKO VIKTOR V,SU;DYUDIN GENNADIJ I,SU
分类号
E21B43/26;(IPC1-7):E21B43/26
主分类号
E21B43/26
代理机构
代理人
主权项
地址
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