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发明名称
Apparatus for phone line switching
摘要
申请公布号
KR20100002998(U)
申请公布日期
2010.03.15
申请号
KR20090016168U
申请日期
2009.12.11
申请人
发明人
分类号
H04L12/64
主分类号
H04L12/64
代理机构
代理人
主权项
地址
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