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发明名称
ACCESS COVERS FOR MANHOLES
摘要
申请公布号
GB8903714(D0)
申请公布日期
1989.04.05
申请号
GB19890003714
申请日期
1989.02.17
申请人
CENTA, ANTONY R
发明人
分类号
E02D29/14;(IPC1-7):E02D29/14
主分类号
E02D29/14
代理机构
代理人
主权项
地址
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