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发明名称
Telephone Exchange.
摘要
申请公布号
GB1171833(A)
申请公布日期
1969.11.26
申请号
GB19670006517
申请日期
1967.02.10
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
分类号
H01J29/92;H04Q3/62
主分类号
H01J29/92
代理机构
代理人
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地址
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