转动带电的圆筒让它接受到原图(被复印的东西)的反射光,就会在有光反射的地方出现放电现象。这样产生的吸附作用会使圆筒在原图(被复印件)反射出的黑色图文部位上附着黑粉,在圆筒下放上复印纸,转动的圆筒就把附着的墨粉印到复印纸上了。
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