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发明名称
ELECTRIC SIGNALLING SYSTEMS
摘要
申请公布号
CA523474(A)
申请公布日期
1956.04.03
申请号
CAD523474
申请日期
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
ERIC M. S. MCWHIRTER;ROLAND H. DUNN;PETER W. LENNOX
分类号
主分类号
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