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发明名称
Sign support
摘要
申请公布号
US2950787(A)
申请公布日期
1960.08.30
申请号
US19580748388
申请日期
1958.07.14
申请人
THE POLLAK STEEL COMPANY
发明人
WALSH EDWARD F.
分类号
E01F9/011
主分类号
E01F9/011
代理机构
代理人
主权项
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