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发明名称
An improved drainage device
摘要
申请公布号
GB976590(A)
申请公布日期
1964.11.25
申请号
GB19620026977
申请日期
1962.07.13
申请人
EDWIN DU GUESCLIN HARRISON;IVAN GODDARD
发明人
分类号
E03F5/04;E04D13/04
主分类号
E03F5/04
代理机构
代理人
主权项
地址
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