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发明名称
UNDERGROUND PIPE ELEMENT PUSHING DEVICE
摘要
申请公布号
EP0188266(A3)
申请公布日期
1987.10.14
申请号
EP19860100384
申请日期
1986.01.14
申请人
SOLTAU GERD
发明人
SOLTAU GERD
分类号
E21B7/04;E21B7/20;(IPC1-7):F16L1/02
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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