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发明名称
CONCRETE TIES
摘要
申请公布号
US3664584(A)
申请公布日期
1972.05.23
申请号
USD3664584
申请日期
1970.02.09
申请人
ABEX CORP.
发明人
RAYMOND J. NOVOTNY
分类号
E01B3/32;E01B9/30;(IPC1-7):E01B9/30
主分类号
E01B3/32
代理机构
代理人
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地址
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