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发明名称
Automatic switching system
摘要
申请公布号
US2900497(A)
申请公布日期
1959.08.18
申请号
US19560591463
申请日期
1956.06.14
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
SANDE GEORGE VANDE
分类号
B61L17/00
主分类号
B61L17/00
代理机构
代理人
主权项
地址
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