Study on the performance of the Eraser and the match as a single lump of eraser using the type of timber and the substance, timber is an invention of the eraser. Study on variables such as the type of chemical species of the type of timber, timber, water, water, water, water, timber, timber species and Thai varieties India. Kinds of chemicals, including sulfuric and acetic acid Results from the survey showed that currently, the Eraser is very expensive. The performance of the eraser, Eraser invention bad enough itself to save the expense required for stationery and from this cause Group. a comparative study of the type of timber that affect performance in the cleaning of the eraser. I found that when both types of erasers to compare performance. Using a 5 cm long tick 2B on A4 paper, the criteria used to measure the color of the gradient, Eraser, rubber water from scratch, rather than powerful Thai India. Through a comparative study of level .... what kind of chemical that is mixed with water, timber and arrested as a lump sum. The test is to measure the density by releasing Eraser, 2 rolls into a 600 ml beaker and water release measures small eraser until the bottom of the beaker was found when releasing Eraser is made of sulfur into the beaker water. The speed from the surface to the bottom of the beaker, it retains that Eraser seconds .... more acetic speed is ... seconds, which is more than speed eraser that retains more acetic. Even so, the eraser only ... from sulfur acid so it has a density greater than the eraser that retains more acetic.
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