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发明名称
Электроперфоратор для бурения шпуров
摘要
申请公布号
SU85644(A1)
申请公布日期
1949.11.30
申请号
SU19490407348
申请日期
1949.11.21
申请人
GRIGOREV L.YA.
发明人
GRIGOREV L.YA.
分类号
E21B3/02
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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