To prevent access by children to “adult” or colecciones books stored in a shelf with sdvizhnye glasses will help ordinary furniture lock with retractable tongue and bent from steel strip. The thickness of the strips is determined by the gap between the panes.
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UNIVERSAL INDICATOR
Two LEDs with different color (e.g., red and green), you can build a simple indicator for voltages from 4.5 to 220 V. It is also able to determine the polarity of the source in the range...
WALL SOUVENIR
"Modelist-Konstruktor" awakened in me a thirst for innovation, the desire to do something with their hands. One of his simplest works, I would like to submit to the judgment of the...