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发明名称
VIBROROTARY DRILLING APPARATUS
摘要
申请公布号
SU1452966(A1)
申请公布日期
1989.01.23
申请号
SU19864150448
申请日期
1986.11.24
申请人
VNII ZOLOTA REDKIKH METALLOV
发明人
OSIPOV AVENIR I,SU;BABICHEV ALEKSANDR V,SU;BRAGIN SERGEJ T,SU
分类号
E21B7/24
主分类号
E21B7/24
代理机构
代理人
主权项
地址
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