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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Is it not tempting to build a motorized plow whose construction has almost no welded joints! That is why the article “At the wheel of a veloplow” published in “M-K” No. 3, 1985—on how to...
