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发明名称
SISTEMA DI COMMUTAZIONE MODULARE.
摘要
申请公布号
IT7822797(D0)
申请公布日期
1978.04.28
申请号
IT19780022797
申请日期
1978.04.28
申请人
INTERNATIONAL BUSINESS MACHINES CORP.
发明人
分类号
H04Q3/52;H04Q11/04;H04Q11/06;(IPC1-7):H03C/
主分类号
H04Q3/52
代理机构
代理人
主权项
地址
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