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发明名称
Bleistift mit auswechselbarer Mine und Verfahren zu seiner Herstellung
摘要
申请公布号
DE1561786(A1)
申请公布日期
1970.04.02
申请号
DE19671561786
申请日期
1967.10.02
申请人
FA. FRITZ WITT
发明人
WITT,WALTER
分类号
B43K21/16
主分类号
B43K21/16
代理机构
代理人
主权项
地址
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