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发明名称
Manufacture method of manhole-hoop for a reactor and a manhole cover apparatus by using the same
摘要
申请公布号
KR100577467(B1)
申请公布日期
2006.05.10
申请号
KR20040011011
申请日期
2004.02.19
申请人
发明人
分类号
E02D29/14
主分类号
E02D29/14
代理机构
代理人
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