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
The Yak-18
Initial training aircraft Yak-18 was based on UT-2. Its first flight took place on may 6, 1946 (test pilot G. S. Klimushkin), and the second, with the more powerful M-11FR — may 17,...
RELAY “TOUCH”
Simply by touching the sensing element and actuates an electronic device that includes an alarm or actuator. The sensing element Ан1 — plated plate connected through a resistor R2 with a...
