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发明名称
A manhole/grating cover and frame assembly
摘要
申请公布号
GB9500017(D0)
申请公布日期
1995.03.01
申请号
GB19950000017
申请日期
1995.01.04
申请人
P.P.K. INTERNATIONAL
发明人
分类号
主分类号
代理机构
代理人
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