In houses with more than five floors the lift is almost irreplaceable aid. Medical survey proved that normal walk upstairs is 2.5 times more demanding than fast ride on the bike, and even slow walk upstairs with heavier load is comparable to top-class sport performance. The first lift known was constructed by the Greek scientist Archimedes in about 236 B.C. A cabin was hanging on a metal rope and lifted up by manual winch ...
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