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发明名称
Vorrichtung zum Loesen von Konusverbindungen
摘要
申请公布号
DE835582(C)
申请公布日期
1952.04.03
申请号
DE1951H008278
申请日期
1951.04.24
申请人
HERMANN HEMSCHEIDT MASCHINENFABRIK
发明人
KREY AUGUST
分类号
E21B19/18
主分类号
E21B19/18
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代理人
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