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发明名称
MECHANICAL PENCIL
摘要
申请公布号
CA370832(A)
申请公布日期
1937.12.28
申请号
CAD370832
申请日期
申请人
THE EAGLE PENCIL COMPANY
发明人
ISIDOR CHESLER
分类号
主分类号
代理机构
代理人
主权项
地址
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