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发明名称
BOREHOLE-DRILLING APPARATUS
摘要
申请公布号
SU746106(A2)
申请公布日期
1980.07.07
申请号
SU19782566450
申请日期
1978.01.09
申请人
VNI PK UGOLNYJ I "KUZNIUI"
发明人
BORONOV NIKOLAJ N,SU;SHIROKOV ANATOLIJ P,SU
分类号
E21B15/00;(IPC1-7):E21C11/00
主分类号
E21B15/00
代理机构
代理人
主权项
地址
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