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发明名称
Backward preventing apparatus of the drain pipe
摘要
申请公布号
KR200449614(Y1)
申请公布日期
2010.07.23
申请号
KR20080006726U
申请日期
2008.05.23
申请人
发明人
分类号
E02D29/12
主分类号
E02D29/12
代理机构
代理人
主权项
地址
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