MATERIAL DIDACTICO PARA EL CALCULO DE AREAS DE FIGURAS PLA- NAS,申请号ES19990002520U-传众专利搜索

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发明名称	MATERIAL DIDACTICO PARA EL CALCULO DE AREAS DE FIGURAS PLA- NAS
摘要
申请公布号	ES252099(Y)	申请公布日期	1981.04.16
申请号	ES19990002520U	申请日期	1980.07.16
申请人		发明人
分类号	G09B23/04;(IPC1-7):09B23/04	主分类号	G09B23/04
代理机构		代理人
主权项
地址

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