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发明名称
Долото для ударного бурения
摘要
申请公布号
SU25567(A1)
申请公布日期
1932.03.31
申请号
SU19300073065
申请日期
1930.07.09
申请人
SEMENKOVICH V.N.
发明人
SEMENKOVICH V.N.
分类号
E21B10/36
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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