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发明名称
METHOD OF MAKING DRAWING CORE STICK FOR COLOURED PENCILS WITH WOODEN AND NON-WOODEN HANDLES
摘要
申请公布号
PL147692(B1)
申请公布日期
1989.07.31
申请号
PL19860261548
申请日期
1986.09.25
申请人
发明人
分类号
C09D;C09D13/00;(IPC1-7):C09D13/00
主分类号
C09D
代理机构
代理人
主权项
地址
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