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发明名称
换芯比例尺
摘要
本实用新型涉及一种可调换多个比例的比例直尺,它包括比例尺芯,上、下尺片。三者可用四个小螺丝组成一个完整的尺体。用它能调换组合出许多个比例,可以通用于制图行业,使用方便,成本、价格低廉。
申请公布号
CN2088045U
申请公布日期
1991.11.06
申请号
CN90222221.X
申请日期
1990.10.11
申请人
王宏
发明人
王宏
分类号
B43L7/00
主分类号
B43L7/00
代理机构
代理人
主权项
1、一种换尺芯的比例直尺,它包括上、下尺片和比例尺芯,其特征在于:上尺片有一凹槽,比例尺芯安置在上、下尺片之间,并可更换选择比例尺芯,组合成一体。
地址
810000青海省西宁市北大街6号楼204号
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