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摘要
方块的主视图和俯视图上的数字及符号具有不同的颜色。
申请公布号
CN88300806S
申请公布日期
1988.11.25
申请号
CN88300806
申请日期
1988.02.22
申请人
钟东; 祝普来
发明人
钟东;祝普来
分类号
21-01-P0505
主分类号
21-01-P0505
代理机构
代理人
主权项
地址
江苏省南京市中央路405号
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