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发明名称
CONICAL PAPER UNIT FOR REINFORCING CONICAL SPEAKER
摘要
申请公布号
KR1019920003710(B1)
申请公布日期
1992.05.09
申请号
KR1019900005293
申请日期
1990.04.17
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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