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发明名称
Selective signaling system
摘要
申请公布号
US1830974(A)
申请公布日期
1931.11.10
申请号
US19250069042
申请日期
1925.11.14
申请人
WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY
发明人
WHITE THOMAS U.
分类号
H02J13/00
主分类号
H02J13/00
代理机构
代理人
主权项
地址
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