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发明名称
Dispositif d'appointage pour des crayons de graphite ou de couleurs, notamment pour des mines sans habillage
摘要
申请公布号
FR987874(A)
申请公布日期
1951.08.20
申请号
FRD987874
申请日期
1949.06.08
申请人
发明人
SEUFERT HANS
分类号
B43L23/00
主分类号
B43L23/00
代理机构
代理人
主权项
地址
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