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发明名称
数学曲线板
摘要
后视图与主视图对称故省略后视图;本外观设计为透明塑料制成。
申请公布号
CN3421679D
申请公布日期
2005.01.26
申请号
CN200430058584.5
申请日期
2004.07.07
申请人
张冬耕
发明人
张冬耕
分类号
19-06
主分类号
19-06
代理机构
徐州市淮海专利事务所
代理人
胡亚辉
主权项
地址
221166 江苏省徐州市北郊徐州电力技工学校
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