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朱发根的陋室。墙上,贴着他的荣耀和艰辛——1988年2月11日国家专利局颁发的“组合数理学具”专利证书;桌上,摆着一只体积只有方砖大的东西——这就是他耗费了三年多心血发明出来的、由山西省太原市科教仪器厂正式生产的“组合数理学具”。学具的成本只要12元。学生用它可做实验200多种。实验项目抄录如下:智建造模型和趣味物理部分20项;平面几何部分33项;轨迹演示19项;初中物理部分37项;高中物理部分30项;立体几何部分38项;三角函数部分6项;二次曲线部分4项;参数方程部分4项;极坐标部分4项;空间解析几何部分2项;理论力学部分3项。有关专家鉴定以后,无不惊叹:朱发根实现了一个美妙的梦！
Zhu Fagen’s bedroom. On the wall, his glory and hardships were affixed to the patent certificate of “Combination Mathematical Learning Tools” issued by the National Patent Office on February 11, 1988; He spent more than three years of painstakingly invented “combination mathematics learning equipment” that was officially produced by Science and Education Instrument Factory of Taiyuan City, Shanxi Province. The cost of learning equipment is only 12 yuan. Students can use it for more than 200 experiments. The experimental project was reproduced as follows: 20 intellectual building models and interesting physical parts; 33 plane geometry parts; 19 trajectory demonstrations; 37 junior high school physics parts; 30 high school physics parts; 38 solid geometry parts; 6 trigonometric function parts; There are 4 items in the quadratic curve; 4 items in the parametric equation part; 4 items in the polar coordinate part; 2 items in the spatially resolved geometric part; 3 items in the theoretical mechanics part. After the appraisal of experts, all are amazed: Zhu Fagen realized a wonderful dream!