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发明名称
Rotary eraser
摘要
申请公布号
US2074255(A)
申请公布日期
1937.03.16
申请号
US19360068937
申请日期
1936.03.14
申请人
DODSON DAVID A
发明人
DODSON DAVID A.
分类号
B43L19/00
主分类号
B43L19/00
代理机构
代理人
主权项
地址
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