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发明名称
Improvements in two-way transmission systems
摘要
申请公布号
GB541742(A)
申请公布日期
1941.12.09
申请号
GB19400012370
申请日期
1940.07.31
申请人
ASSOCIATED ELECTRIC LABORATORIES INC.
发明人
分类号
H04B3/20
主分类号
H04B3/20
代理机构
代理人
主权项
地址
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