FIELD: protection of transport gate against unauthorized entry to guarded territory. SUBSTANCE: obstruction set has beam with counterweight, supports with rotation axle of beam. Arc-shaped beam with hoisting rope is positioned longitudinally and is linked by flexible joint to leaf of sliding gate transmitting motion for rise or lowering of beam. EFFECT: provision for detention of vehicle and reduction of load on hoisting rope. 2 cl, 2 dwg
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