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发明名称
ELECTRICAL SIGNALLING SYSTEMS
摘要
申请公布号
GB1224817(A)
申请公布日期
1971.03.10
申请号
GB19680047237
申请日期
1968.10.04
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
分类号
H04Q1/448
主分类号
H04Q1/448
代理机构
代理人
主权项
地址
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