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发明名称
MANHOLE INSPECTION COVER
摘要
申请公布号
GB9014382(D0)
申请公布日期
1990.08.22
申请号
GB19900014382
申请日期
1990.06.28
申请人
BEAK, ALAN
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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