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发明名称
Safety signal operator
摘要
申请公布号
US2191381(A)
申请公布日期
1940.02.20
申请号
US19390266615
申请日期
1939.04.07
申请人
HANSON ERNEST E
发明人
HANSON ERNEST E.
分类号
B60T17/22
主分类号
B60T17/22
代理机构
代理人
主权项
地址
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