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发明名称
Regelvorrichtung fuer drehend wirkende Bohreinrichtungen
摘要
申请公布号
DE507895(C)
申请公布日期
1930.09.22
申请号
DE1928B140519D
申请日期
1928.11.14
申请人
FRANZ BADE
发明人
分类号
E21B19/08
主分类号
E21B19/08
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代理人
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