
What if you need to draw a circle, and a compass at hand is not! To get out of this situation by making a simple compass of the bent and strapped to the pencil in the right place for a stylus pen, as shown in the figure.
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Do not rush to throw undeveloped stem of a ballpoint pen, when suddenly the paste will cease to act from it. Very often it is due to the fact that the open part of the thin plastic tube...