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经营范围
发明名称
Guard rail
摘要
申请公布号
US1873915(A)
申请公布日期
1932.08.23
申请号
US19310571095
申请日期
1931.10.26
申请人
AID WILLIAM F
发明人
AID WILLIAM F.
分类号
E01B5/18
主分类号
E01B5/18
代理机构
代理人
主权项
地址
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