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发明名称
ROTARY-TURBINE DRILL
摘要
申请公布号
SU1613623(A1)
申请公布日期
1990.12.15
申请号
SU19894633600
申请日期
1989.01.09
申请人
VNII BUROVOJ TEKHNIKI
发明人
POPOV ALEKSANDR N,SU;LI SAMDYK CH,SU;VALDMAN ISAAK YA,SU
分类号
E21D1/06
主分类号
E21D1/06
代理机构
代理人
主权项
地址
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