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发明名称
Verfahren zum Loesen von festgelaufenen Bohrgeraeten
摘要
申请公布号
DE958377(C)
申请公布日期
1957.02.21
申请号
DE1955G017632
申请日期
1955.07.22
申请人
GEWERKSCHAFT BRIGITTA
发明人
DR. FERDINAND HEINRICH DANIEL ALBERT TRUSHEIM
分类号
E21B31/03
主分类号
E21B31/03
代理机构
代理人
主权项
地址
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