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发明名称
Abschlagvorrichtung fuer Bohrkronen und auswechselbare Einsteckenden an Bohrstangen
摘要
申请公布号
DE827787(C)
申请公布日期
1952.01.14
申请号
DE1950V000798
申请日期
1950.04.02
申请人
DIPL.-BERGING. ERNST VESPERMANN
发明人
VESPERMANN DIPL.-BERGING. ERNST
分类号
E21B19/18
主分类号
E21B19/18
代理机构
代理人
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