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经营范围
发明名称
FILLING DAM
摘要
申请公布号
PL131009(B1)
申请公布日期
1984.09.29
申请号
PL19800221604
申请日期
1980.01.24
申请人
发明人
分类号
E21F;E21F15/02;E21F15/04;(IPC1-7):E21F15/02
主分类号
E21F
代理机构
代理人
主权项
地址
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