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发明名称
Train signal
摘要
申请公布号
US2238843(A)
申请公布日期
1941.04.15
申请号
US19390252453
申请日期
1939.01.23
申请人
ANDERSON JAMES B
发明人
ANDERSON JAMES B.
分类号
B61L15/00;F21S8/10
主分类号
B61L15/00
代理机构
代理人
主权项
地址
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