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经营范围
发明名称
Improvements in or relating to switching circuits for automatic telephone systems
摘要
申请公布号
GB753023(A)
申请公布日期
1956.07.18
申请号
GB19540003075
申请日期
1954.02.02
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
分类号
H01H67/12
主分类号
H01H67/12
代理机构
代理人
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地址
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