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发明名称
TRAFFIC SIGN
摘要
申请公布号
CA825375(A)
申请公布日期
1969.10.21
申请号
CAD825375
申请日期
申请人
DONALD M. DOWNING
发明人
DONALD M. DOWNING
分类号
主分类号
代理机构
代理人
主权项
地址
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