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发明名称
ROHRVERBINDUNG, INSBESONDERE FUER BOHRROHRE
摘要
申请公布号
AT346792(B)
申请公布日期
1978.11.27
申请号
AT19770002713
申请日期
1977.04.19
申请人
FERDINAND AUFSCHLAEGER KG
发明人
分类号
E21B17/046;F16L25/00;(IPC1-7):E21B17/02
主分类号
E21B17/046
代理机构
代理人
主权项
地址
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