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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The aircraft short takeoff and landing An-72 was created to solve special military problems. To increase the lift coefficient of the wing engines located on its upper surface. However,...
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They say that squirrels dry mushrooms and berries — stock for the winter, — knots stringing them on trees. Don't know how true this is, but nevertheless it is this simple principle I...
