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 WAY TO “EAST”
Model-a copy of the ballistic missile R-2 In 1951, took arms ballistic missile R-2 (product 8Ж38), created under the leadership of S. P. Korolev. Its performance characteristics were:...
A CRANE WORKS ON THE PROGRAM
It is made by a group of engineering students laboratory in the Sverdlovsk House of pioneers named after Yuri Gagarin. Appearance of the crane shown in figure 1. On the frame beam crane...
