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The eraser is used to erase the underdrawing.
There are a kneaded eraser and a sand eraser
besides the eraser made of plastic general.
A left photograph is the kneading eraser.
When you erase the drawn draft,
because if you use it up to down,
paper comes to smash,
moving it only in one direction is good.
Moreover, the screen tone can be smoothly cut down
by using the sand eraser.
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