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发明名称
MARKING CHALK SHARPENING DEVICE
摘要
申请公布号
CA743360(A)
申请公布日期
1966.09.27
申请号
CAD743360
申请日期
申请人
HERBERT L. WAX
发明人
HERBERT L. WAX
分类号
主分类号
代理机构
代理人
主权项
地址
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