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发明名称
DIRECTIONAL RELAY
摘要
申请公布号
CA415883(A)
申请公布日期
1943.10.19
申请号
CAD415883
申请日期
申请人
CANADIAN WESTINGHOUSE COMPANY
发明人
BERT V. HOARD
分类号
主分类号
代理机构
代理人
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