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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WHEN A DRILL OF SMALL DIAMETER
In the "M-K" № 9, 1985 our reader Yuri Zhdanov recommended for clamping in the Chuck of a drill of small diameter to apply the "shirt" is a spiral of thin wire. However, a hand drill and...
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The electroforming technique of electrolytic deposition of metals on the surface of various objects (matrices) with the aim of obtaining accurate metal copies were first developed and...
