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经营范围
发明名称
Drainage Ditch Headwall Unit
摘要
申请公布号
GB2009281(A)
申请公布日期
1979.06.13
申请号
GB19780032815
申请日期
1978.08.09
申请人
ROBERTSON CO H H
发明人
分类号
E01F5/00;E02B11/00;(IPC1-7):E02B11/00
主分类号
E01F5/00
代理机构
代理人
主权项
地址
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