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发明名称
BOREHOLE-DRILLING DEVICE
摘要
申请公布号
SU794141(A1)
申请公布日期
1981.01.07
申请号
SU19792741272
申请日期
1979.03.27
申请人
PROIZV NII PO INZHENERNYM IZYSKANIYAM V STROITELSTVE GOSSTROYA SSSR
发明人
DOLODARENKO STANISLAV A,SU;FAERMAN NATAN B,SU
分类号
E21B1/00;E21B7/24;(IPC1-7):E21B7/24
主分类号
E21B1/00
代理机构
代理人
主权项
地址
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