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经营范围
发明名称
Automatic Telephone Exchange.
摘要
申请公布号
GB1178443(A)
申请公布日期
1970.01.21
申请号
GB19670041944
申请日期
1967.09.14
申请人
HITACHI LTD
发明人
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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