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发明名称
SOUND-EQUIPMENT FOR NATURAL STUDY
摘要
申请公布号
KR910002411(Y1)
申请公布日期
1991.04.11
申请号
KR19880003779U
申请日期
1988.03.21
申请人
DEOG SEONG TRADING CO.,LTD.
发明人
PARK, JAE-HUN
分类号
G09B5/06;(IPC1-7):G09B5/06
主分类号
G09B5/06
代理机构
代理人
主权项
地址
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