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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That move through the water can be sitting for the PA log, and water starting from the first available under the hand with a stick, has been known for many thousands of years. For such a...
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I would like to tell the readers of the magazine about a catamaran whose movement was achieved using the Magnus effect. The Magnus effect consists in the fact that when a rotating body...
