要按造势媒体的说法，全世界都正在朝着3D打印革命的方向一路飞奔。
To hear the hype machine tell it , the world is hurtling headlong into a 3-D printing revolution .
打印字符时，打印头沿着打印行方向移动的一种打印机。
A printer in which a print head moves along a line as it prints characters on the line .
打印方向打印方向打印方向