a printer that prints a single character at a time
双语例句
A printer that forms dot matrix characters by means of linear, ridged print hammers that impact paper and ribbon against a helical ridge on a rotating cylinder. 一种采用线性脊纹打印锤的点阵字符打印机，打印时打印锤撞击紧贴在螺旋脊纹旋转圆筒上的纸和色带。
