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发明名称
PROCEDE DE MISE EN PLACE D'UNE CANALISATION
摘要
申请公布号
BE831519(A1)
申请公布日期
1975.11.17
申请号
BE19750158426
申请日期
1975.07.18
申请人
发明人
分类号
E21B7/04;E21B7/28;E21B21/00;E21D9/08;H02G1/06
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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