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经营范围
发明名称
SHIFTABLE FILLING DAM
摘要
申请公布号
PL131871(B1)
申请公布日期
1985.01.31
申请号
PL19800225130
申请日期
1980.06.19
申请人
发明人
分类号
E21D23/04;E21F15/02;(IPC1-7):E21F15/02
主分类号
E21D23/04
代理机构
代理人
主权项
地址
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