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发明名称
Railway signaling apparatus
摘要
申请公布号
US2108483(A)
申请公布日期
1938.02.15
申请号
US19350022052
申请日期
1935.05.17
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
GRONDAHL LARS O.
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
主权项
地址
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