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经营范围
发明名称
Electrical signalling systems
摘要
申请公布号
GB540233(A)
申请公布日期
1941.10.09
申请号
GB19400008188
申请日期
1940.05.07
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H03K7/04;H04B1/12
主分类号
H03K7/04
代理机构
代理人
主权项
地址
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