天平是测量质量的工具,它是依据杠杆原理(以后会学习)工作的.关于天平最早的记载见于古埃及的纸草书上,它是采用立柱悬挂形式,与托盘天平不同,可以称之为“吊式天平”.通常我们见到的天平的两臂是等长的.现代广泛使用的精密天平大都是吊式的,如图1所示,是一架物理天平.而托盘天平在日常生产和生活中用得较多,在 The balance is a measure of the quality of the tool, it is based on the principle of leverage (will learn later). The earliest records on the scale found in the ancient Egyptian paper cursive book, which is the use of column suspension form, different from the pallet balance can be called "We usually see the scale of the arms are equal length. Modern widely used precision balances are mostly hanging, as shown in Figure 1, is a physical balance. Pallet balance in the daily Used more in production and in life