CASIO fx-4800p calculator CASIOfx4800P计算器
casio fx
卡西欧外汇
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In 1985, Casio introduced the world's first graphing calculator, the fx-7000G, and in 2004 the company released the fx-82ES scientific calculator with textbook display that shows fractions and root functions as they appear in textbooks.
ENGADGET: Casio's touchscreen graphing calculator arrives in 2013, makes the TI-84+ look dated
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