If the head of the screw to give with the help of nalilsya the form shown in the figure, then any attacker will not be able to turn. On such hardware it is recommended to set sensible things sailing and motor boats, hook locks.
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THE MAGNETIC FIELD IS A SATELLITE OF THE CURRENT
Remember, what is the simplest electrical circuit? The galvanic battery and light bulb connected by conductors through the switch (see the article "Ohm's law" in the "M-K" N2 9, 1978)....
THE PHOTOGRAPHIC ENLARGER FROM A CAN…
The device, which we advise you to do, simple and affordable to manufacture a wide range of novice photographers, especially those who love tinkering. The appearance of a photographic...
