卡西欧 FX-991CN X 中文版科学计算器

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• intros：{"brand_intro":"卡西欧（CASIO）创立于1946年，日本知名电子仪器制造商，以计算器、手表、电子乐器闻名。其计算器产品线覆盖基础办公、科学工程及金融领域，凭借高精度、耐用性和创新功能（如太阳能供电、自然书写显示）成为全球教育及工程计算领域的标杆品牌，中国市场占有率长期领先。","product_intro":"FX-991CN X是卡西欧专为中国市场打造的中文版科学计算器，支持498种计算功能，涵盖微积分、矩阵、向量、复数、方程求解及统计回归。采用高清液晶屏与自然书写显示，可输入分数、根号等符号。内置太阳能与纽扣电池双电源，适合高中、大学及工程考试使用，是国家级考试指定型号。","key_specs":["显示类型：点阵液晶，自然书写显示","功能数量：498种计算功能","电源：太阳能+纽扣电池LR44双供电","适用考试：全国高中数学联赛、注册工程师考试","尺寸：约165.5×77×11.1mm","重量：约95g（含电池）"]}
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