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发明名称
试卷密封针
摘要
本实用新型试卷密封针,针眼不在针体的一端,针眼与针尖之间的距离约占针体总长的1/5,在针眼处引线将该针穿过试卷,并把线的一端留在试卷的背面,辅以普通小针,一次性完成封卷任务。
申请公布号
CN2082725U
申请公布日期
1991.08.14
申请号
CN90218232.3
申请日期
1990.08.16
申请人
王继柱
发明人
王继柱
分类号
D05B91/02
主分类号
D05B91/02
代理机构
代理人
主权项
一种试卷密封针,包括针体和针眼,其特征在于针眼位于距针尖距离为针体总长的七分之一至三分之一的针体上。
地址
273300山东省平邑第一中学生物组
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