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发明名称
Verfahren zur Herstellung einer Graphitschreibmine
摘要
申请公布号
DE1519156(A1)
申请公布日期
1969.10.30
申请号
DE19631519156
申请日期
1963.06.04
申请人
FA.J.S. STAEDTLER
发明人
HEINZ SPATZEK,DIPL.-ING.DR.;ERICH FITZER,DIPL.-ING.DR.;SELKA,FRITZ
分类号
B43K19/18;C08L61/10
主分类号
B43K19/18
代理机构
代理人
主权项
地址
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