Carefully cut a circle from the cardboard using scissors is very difficult. To help in this work can usually tsyrkul fixed in his foot, as shown in the figure, a razor blade.
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For connecting various electronic and household devices designed for a constant voltage of 9, 12 or 15 V, requires adapter (the adapter from the network 220V). Usually every device it...
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Clutch pencil, calculated on a fat pencil, can find unexpected applications. For example, help in cases when a small screw you need to tighten in tight spaces; turn into a ballpoint pen,...
