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发明名称
METHOD FOR MANUFACTURING PENCIL LEADS
摘要
申请公布号
KR1019810001009(B1)
申请公布日期
1981.08.29
申请号
KR1019780002806
申请日期
1978.09.15
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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