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发明名称
Replacing buried pipe
摘要
申请公布号
GB2167156(A)
申请公布日期
1986.05.21
申请号
GB19840028925
申请日期
1984.11.15
申请人
* EXPAND-A-LINE INC
发明人
ALAN E * THOMPSON
分类号
E21B7/30;F16L55/165;(IPC1-7):F16L1/02
主分类号
E21B7/30
代理机构
代理人
主权项
地址
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