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摘要
申请公布号
DE861425(C)
申请公布日期
1953.01.05
申请号
DE1950A003191
申请日期
1950.08.11
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED
发明人
DAVISON ALAN
分类号
H04M3/64;H04Q3/52
主分类号
H04M3/64
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