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发明名称
Drainage material and drainage core for a drainage system
摘要
申请公布号
US4815892(A)
申请公布日期
1989.03.28
申请号
US19880146544
申请日期
1988.01.21
申请人
NETLON LIMITED
发明人
MARTIN, KEITH F.
分类号
E02D3/10;E02B11/00;E02D31/02;(IPC1-7):E02B11/00
主分类号
E02D3/10
代理机构
代理人
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地址
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