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发明名称
TONE RINGER CIRCUIT
摘要
申请公布号
KR1019820001698(B1)
申请公布日期
1982.09.17
申请号
KR1019810000895
申请日期
1981.03.18
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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