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发明名称
Eraser-cleaning machine
摘要
申请公布号
US1770935(A)
申请公布日期
1930.07.22
申请号
US19270211173
申请日期
1927.08.06
申请人
WALTER J. MCMILLAN
发明人
LOCHMAN EMIL R.
分类号
B43L21/02
主分类号
B43L21/02
代理机构
代理人
主权项
地址
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