FIELD: satisfaction of human vital needs.
SUBSTANCE: invention relates to satisfaction of human vital needs. Chain ladder consists of two pairs of dissimilar arcs parallel connected on axis by articulated joint, two stops, two hooks, hinged attachment of stairs, steps, beds, at the same time beds are made in the form of chain links, and steps are splined joint are fixed in chain links.
EFFECT: saving life and health of people during fires, smoke-off in premises of buildings located at considerable distance from ground surface.
1 cl, 3 dwg
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