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发明名称
Filter boxes for use when laying drainage pipes and a pipe-laying method utilising said boxes
摘要
申请公布号
GB910591(A)
申请公布日期
1962.11.14
申请号
GB19590006388
申请日期
1959.02.24
申请人
GUY HALDEN DEMPSTER
发明人
分类号
E02B11/00
主分类号
E02B11/00
代理机构
代理人
主权项
地址
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