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
IN 1 STEP TO THE PODIUM
Among the expense of building a traditional models, the class b-1, includes construction on an oversized fuselage, equipped with a rubber motor, is in artistic terms, perhaps, of...
ELECTRONIC METRONOME
It is used in teaching music in rhythmic gymnastics, in experiments in physics etc. a Metronome, a scheme which offers Bulgarian journal "Radio Television Electronics" (see Fig.), gives...
