The thermostat is based on the fact that different metals have different coefficients of expansion.
恒温器是以不同的金属有不同的膨胀系数这一事实为根据的。
A binary-coded decimal code for representing decimal numbers in which each decimal digit is represented by seven binary digits which are coefficients of8,6,4,2,0,1,0, respectively.
用于表示十进制数的一种二进制编码的十进制码, 其中每位十进制数用七位二进制数来表示, 它们分别是8, 6, 4, 2, 0, 1和0的系数。五－二码表如下：
