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发明名称
KEY TELEPHONE STATION CONCENTRATOR
摘要
申请公布号
CA887328(A)
申请公布日期
1971.11.30
申请号
CAD887328
申请日期
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
DIETER J. H. KNOLLMAN
分类号
主分类号
代理机构
代理人
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