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发明名称
Signal transmitting apparatus
摘要
申请公布号
US2189171(A)
申请公布日期
1940.02.06
申请号
US19360102774
申请日期
1936.09.26
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
GIRARDIN LOUIS
分类号
B61L3/22
主分类号
B61L3/22
代理机构
代理人
主权项
地址
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