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发明名称
粉笔书写器
摘要
一种粉笔书写器,由空心圆柱体与固定夹组成。在保持粉笔现有形状的前提下,采用粉笔与手隔离的原理,起到防污手、保护使用者健康、防折断、提高粉笔利用率,为国家节约开支的作用。
申请公布号
CN2083543U
申请公布日期
1991.08.28
申请号
CN91202834.3
申请日期
1991.02.21
申请人
周新友
发明人
周新友
分类号
B43K23/02
主分类号
B43K23/02
代理机构
代理人
主权项
1、一种供教学用的粉笔书写器,其特征是由空心圆柱体和固定夹两部分组成。
地址
463300河南省汝南师范学校
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