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发明名称
Коронка для выбуривания угольных пластов или бурения скважин
摘要
申请公布号
SU122725(A1)
申请公布日期
1959.11.30
申请号
SU19590616159
申请日期
1959.01.09
申请人
IMAS A.D.;LYAPIN D.P.;SHAPIRO I.G
发明人
IMAS A.D.;LYAPIN D.P.;SHAPIRO I.G
分类号
E21B17/04
主分类号
E21B17/04
代理机构
代理人
主权项
地址
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