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发明名称
menhole cover for close up tightly and open, and opening and shuting instrument putting forth small strength
摘要
申请公布号
KR100634634(B1)
申请公布日期
2006.10.13
申请号
KR20040001893
申请日期
2004.01.12
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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