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发明名称
ELECTRIC SIGNALLING SYSTEMS
摘要
申请公布号
CA555992(A)
申请公布日期
1958.04.15
申请号
CAD555992
申请日期
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
JOSEPH RICE;ESMOND P. G. WRIGHT;DONALD A. WEIR
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