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发明名称
Schlagscherenartige Ruetteleinrichtung zum Loesen eines im Bohrloch festsitzenden Gestaengerohres
摘要
申请公布号
DE1094207(B)
申请公布日期
1960.12.08
申请号
DE1959I016670
申请日期
1959.06.30
申请人
JOY MANUFACTURING COMPANY
发明人
BROWN ORA ALEX
分类号
E21B31/107
主分类号
E21B31/107
代理机构
代理人
主权项
地址
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