FIELD: mechanical engineering. SUBSTANCE: this relates to telescopic type ladders for use in construction and erection operations, in collecting fruits from trees in agriculture, in fire-fighting and other emergency cases. Ladder has telescopic posts of similar diameter pipes over entire length of section and also has convex and concave bands. Installed in points of connection of telescopic posts is transfer unit carrying fixing mechanism with footstep secured in it which is of enclosed profile. EFFECT: high efficiency. 2 cl, 6 dwg
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