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发明名称
Spuelkopf fuer Tiefbohranlagen
摘要
申请公布号
DE728868(C)
申请公布日期
1942.12.04
申请号
DE1939M145712D
申请日期
1939.07.28
申请人
MANNESMANN-TRAUZL A.G.
发明人
SCHIMMEL DR.-ING. HANS
分类号
E21B21/02
主分类号
E21B21/02
代理机构
代理人
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