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发明名称
Vorrichtung zum selbsttaetigen Vorschub des Bohrmeissels
摘要
申请公布号
DE581235(C)
申请公布日期
1933.07.27
申请号
DE1932S103324D
申请日期
1932.02.20
申请人
MITROFAN M. SKWORZOW
发明人
分类号
E21B19/08
主分类号
E21B19/08
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