(57) The apparatus comprises longitudinal and trans- vers guides, defining an annular
route for a plurality of platforms (6) disposed in two rows (1,2) side by side. One
of the row is full, and the other one has a free space for a platform. The platforms
are moved along the annular route in either direction, through a series of lateral
and longitudinal translations the platforms, so as to bring either an empty platform,
in phase of parking a car, or a platform bearing the car desired, in phase of taking
the car back, at a loading-unloading station.
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