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发明名称
METHOD OF FORMING HOLES IN EARTH
摘要
申请公布号
SU825768(A1)
申请公布日期
1981.04.30
申请号
SU19792811639
申请日期
1979.08.28
申请人
GORLOVSKIJ DO POLT INSTITUTA
发明人
MELIKOV EDUARD N,SU;STOROZHENKO MIKHAIL S,SU;KARAULNOV VALERIJ P,SU
分类号
E21B7/30;(IPC1-7):E02D17/14
主分类号
E21B7/30
代理机构
代理人
主权项
地址
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