荣达RD-DH打印机测试程序，通用 ESC/P 打印命令，字符、汉字、图形的正向、反向、左右旋转打印，反白，上下划线、左右划线打印以及任意变高、变宽，行间距、字间距调整、水平制表、曲线打印、条形码打印等功能以及以上功能的混合打印(Ronda rd-dh printer test program, general esc/p printing command, characters, Chinese characters, graphics forward, reverse, left and right rotation printing, reverse white, underline, left and right underline printing and any higher, wider, line spacing, word spacing adjustment, Horizontal tabulation, curve printing, bar code printing, and hybrid printing of the above functions)