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发明名称
Railway signal
摘要
申请公布号
US2551831(A)
申请公布日期
1951.05.08
申请号
US19460672009
申请日期
1946.05.24
申请人
EAVES CARSON D
发明人
EAVES CARSON D.
分类号
B61L29/24
主分类号
B61L29/24
代理机构
代理人
主权项
地址
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