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经营范围
发明名称
Signalling and communication systems
摘要
申请公布号
GB555688(A)
申请公布日期
1943.09.02
申请号
GB19420006996
申请日期
1942.05.22
申请人
STANDARD TELEPHONES AND CABLES, LIMITED
发明人
分类号
H01J17/40;H03F3/64
主分类号
H01J17/40
代理机构
代理人
主权项
地址
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