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发明名称
Dreibockwinde fuer Brunnenbohrungen mit Handbremse und Sperrad
摘要
申请公布号
DE497087(C)
申请公布日期
1930.05.13
申请号
DENDATQ001673D
申请日期
申请人
OTTO QUAECK
发明人
分类号
E21B19/00
主分类号
E21B19/00
代理机构
代理人
主权项
地址
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