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发明名称
DIGITAL SIGNAL GENERATORS
摘要
申请公布号
GB1411945(A)
申请公布日期
1975.10.29
申请号
GB19710050373
申请日期
1971.10.29
申请人
POST OFFICE
发明人
分类号
H04M1/2745;(IPC1-7):H04N1/42
主分类号
H04M1/2745
代理机构
代理人
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