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发明名称
Improvements in or relating to telephone systems
摘要
申请公布号
GB452586(A)
申请公布日期
1936.08.25
申请号
GB19350006012
申请日期
1935.02.25
申请人
STANDARD TELEPHONES AND CABLES LIMITED;ARTHUR MACKENZIE SEARLE
发明人
分类号
H04M9/00
主分类号
H04M9/00
代理机构
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