| 摘要 |
A structure which consists of a platform 1 mounted on scissor-type support means 2, the arms 4 and 5 of which are, respectively, articulated via one end to the said platform 1 and to bearing structures 3, whilst, with the other end, in a contrary manner, they establish rolling support on the said platform 1 and the said structures 3, it being possible to cause the folding and unfolding of said support means 2 by means of corresponding cylinders acting between the arms 4 and 5 thereof, which gives rise to the raising and lowering of the platform 1, the latter constantly being in a horizontal position. <IMAGE>
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