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发明名称
DEVICE FOR DRILLING TEST HOLES
摘要
申请公布号
SU609861(A1)
申请公布日期
1978.06.05
申请号
SU19762332648
申请日期
1976.03.09
申请人
V PROEKTNOIZYSKATELSKIJ NII "GIDROPROEKT" IM. S.YA.ZHUKA
发明人
STRAKHAL VLADIMIR A,SU;ALEKSEEV DMITRIJ A,SU;OSTROVSKIJ VLADIMIR ,SU
分类号
E21B3/00;(IPC1-7):E21B3/00
主分类号
E21B3/00
代理机构
代理人
主权项
地址
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