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发明名称
Improvements relating to manhole or other covers and frames
摘要
申请公布号
GB888284(A)
申请公布日期
1962.01.31
申请号
GB19590039475
申请日期
1959.11.20
申请人
BROADS MANUFACTURING COMPANY LIMITED
发明人
ROBINSON GERALD
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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