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发明名称
Mechanical flat-lead pencil
摘要
申请公布号
US2938498(A)
申请公布日期
1960.05.31
申请号
US19560560352
申请日期
1956.01.20
申请人
A. W. FABER-CASTELL
发明人
BACHMANN HARALD
分类号
B43K21/08
主分类号
B43K21/08
代理机构
代理人
主权项
地址
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