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发明名称
Improvements in and relating to apparatus for the registration of signals in telephone installations
摘要
申请公布号
GB431239(A)
申请公布日期
1935.07.03
申请号
GB19340023966
申请日期
1934.08.20
申请人
EGON ZOLLER
发明人
分类号
H04M11/06
主分类号
H04M11/06
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代理人
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