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发明名称
MANHOLE COVERS GRATINGS &C
摘要
申请公布号
GB8702223(D0)
申请公布日期
1987.03.11
申请号
GB19870002223
申请日期
1987.02.02
申请人
LIGHTHORNE, L
发明人
分类号
E02D29/14
主分类号
E02D29/14
代理机构
代理人
主权项
地址
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