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发明名称
Vorrichtung zum Ausraeumen in das Erdreich eingetriebener Rohre
摘要
申请公布号
DE880236(C)
申请公布日期
1953.06.18
申请号
DE1951G006573
申请日期
1951.07.18
申请人
GRIESEL HEINRICH
发明人
GRIESEL HEINRICH
分类号
E21B7/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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