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发明名称
Verbindung zwischen Rotary-Bohrmeissel und Schwerstange
摘要
申请公布号
DE631398(C)
申请公布日期
1936.06.19
申请号
DE1935P071335D
申请日期
1935.05.30
申请人
PREUSSISCHE BERGWERKS- UND HUETTEN-AKT.-GES., ABTEILUNG BOHRVERWALTUNG
发明人
FALLBOEHMER FRIEDRICH
分类号
E21B17/07;E21B17/16
主分类号
E21B17/07
代理机构
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