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发明名称
Schutzeinrichtung fuer das Aufhaengelager des Kernrohres bei Kernbohrern
摘要
申请公布号
DE957111(C)
申请公布日期
1957.01.31
申请号
DE1954H022137
申请日期
1954.11.18
申请人
DR.-ING. HELMUT HUEGEL
发明人
HUEGEL DR.-ING. HELMUT
分类号
E21B25/00
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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