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发明名称
Road marker
摘要
申请公布号
US1804230(A)
申请公布日期
1931.05.05
申请号
US19300444504
申请日期
1930.04.15
申请人
RAIFE HARRY E
发明人
RAIFE HARRY E.
分类号
E01C23/20
主分类号
E01C23/20
代理机构
代理人
主权项
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