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发明名称
ADJUSTABLE HEIGHT STRUCTURE COVER FOR MANHOLES AND THE LIKE
摘要
申请公布号
US3629981(A)
申请公布日期
1971.12.28
申请号
USD3629981
申请日期
1969.10.06
申请人
JOSEPH S. MCCAFFERY
发明人
JOSEPH S. MCCAFFERY
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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