When working with pencil on wood or cardboard, the pencil lead wears out quickly. To reduce the abrasion of stylus, and increasing the strength of the sharpened part of the pencil need to dip the tip in a quick-drying lacquer: furniture NC, caponiac, potekla.
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In my opinion, the most effective seem to be those developments that do not need to "up from zero": we will focus on improving ready-made industrial electronic devices on their own. The...
