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.
Recommend to read
ICE BIRD
"Ice bird" called athletes Buer-"vosjmimetrovaya" for his high speed and the ease with which it allows you to make turns and maneuver. Especially for "sense the wind": the throttle...
ANOTHER “POCKET”
Young innovators of the Moscow machine-tool plant named after Sergo Ordzhonikidze developed subminiature winch, dimensions of which (240X215X115 mm) allow to call her "pocket". With its...
