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发明名称
Attachment for pencils
摘要
申请公布号
US1767948(A)
申请公布日期
1930.06.24
申请号
US19280265945
申请日期
1928.03.30
申请人
TAYLOR JOHN C
发明人
TAYLOR JOHN C.
分类号
B43K29/18
主分类号
B43K29/18
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