ELECTRONIC DESK CALCULATOR WITH FUNCTION OF SOLUTION OF QUADRATIOC EQUATION

• 1. 一种具有体温检测功能的集成控制计算器 [P] . 中国专利： CN213876720U . 2021-08-03
• 2. 一种具有计时功能的计算器 [P] . 中国专利： CN214540757U . 2021-10-29
• 3. ELECTRONIC DESK CALCULATOR WITH FUNCTION OF SOLUTION OF QUADRATIOC EQUATION [P] . 日本专利： JPS5426634A . 1979-02-28

  机译： 具有二次方程解功能的电子平台计算器

• 4. ELECTRONIC DESK CALCULATOR, AND ACCOUNTING SYSTEM USING ELECTRONIC DESK CALCULATOR [P] . 日本专利： JP2005032043A . 2005-02-03

  机译： 电子平台计算器，以及使用电子平台计算器的会计系统

• 5. PRODUCT AND SUM CALCULATOR USABLE FOR SOLUTION OF PLURAL AND SIMULTANEOUS DIFFERENTIAL EQUATIONS [P] . 日本专利： JPH0225213B2 . 1990-06-01

  机译： 可用于求解多重和同时微分方程的乘积和求和器

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