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发明名称
OPERATING METHOD FOR ELECTRONIC SWITCHING SYSTEM
摘要
申请公布号
KR1019930011200(B1)
申请公布日期
1993.11.25
申请号
KR1019900020355
申请日期
1990.12.12
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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