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发明名称
Highway-guard-fence construction
摘要
申请公布号
US1800641(A)
申请公布日期
1931.04.14
申请号
US19300457218
申请日期
1930.05.29
申请人
ALF JOHNSON
发明人
JOHNSON ALF
分类号
E01F15/06
主分类号
E01F15/06
代理机构
代理人
主权项
地址
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