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发明名称
Locking gully gratings or manhole covers
摘要
申请公布号
GB2079355(A)
申请公布日期
1982.01.20
申请号
GB19800020933
申请日期
1980.06.26
申请人
BRITISH STEEL CORP
发明人
分类号
E02D29/12;E02D29/14;E03F5/06;(IPC1-7):E03F5/06
主分类号
E02D29/12
代理机构
代理人
主权项
地址
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