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 attention of many modelers are attracted to the photos ("M-K", No. 10, 1979) on the international competition teams of the socialist countries on aviamodelling sports. The editors...
