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发明名称
多用量角器
摘要
1.本外观设计可用透明塑料板制成。2.本产品除具有图中所表示的功能外,还可将活尺A′对准量角器上A处,用铆钉铆合,当活尺在量角器上由0度到90度中旋转时,可快速地读出正弦、余弦、正切、余切等三角函数值(精确到二至三个有效数字)。3.省略其它视图。
申请公布号
CN87300101S
申请公布日期
1987.12.10
申请号
CN87300101
申请日期
1987.02.12
申请人
李公珏;李杰
发明人
李公珏;李杰
分类号
19-06-P0458
主分类号
19-06-P0458
代理机构
代理人
主权项
地址
上海市金山县亭林中学
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