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随着科学技术的发展,电子计算器已成为人们工作和生活普遍使用的一种计算工具。我国大连无线电厂制造的DS—5型,天津无线电十五厂制造的EC—201型与日本夏普(SHARP)公司制造的EL—5002型都属于科学型的初级程序电子计算器。它们的体积很小,键盘面板外型尺寸都一样,(长150毫米,阔80毫米,重量170克左右)都可使用交、直流两种电源。计算器的右侧有工作状态的选择开关和角度量度制的选择开关,见图一。这种袖珍电子计算
With the development of science and technology, electronic calculators have become popular computing tools for people’s work and life. The DS-5 model manufactured by Dalian Radio Factory, the EC-201 model manufactured by Tianjin Radio Fifteen Factory and the EL-5002 model manufactured by Japan Sharp Corp (SHARP) belong to the scientific primary program electronic calculators. Their small size, keyboard panel dimensions are the same, (150 mm long, 80 mm wide, weighs about 170 grams) can use AC and DC power supply. The right side of the calculator has a working state of the selector switch and angle measurement of the selection switch, see Figure 1. This pocket-sized electronic calculation