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Device is used to raise and lower apparatuses, it is necessary to adjust the position in height, such as, for example, of the planks to drawing, the chambers black films, of the apparatus to rays chi, tables and of the chairs, this result being obtained with the aid of a single column carrying the object to be displaced
Device is used to raise and lower apparatuses, it is necessary to adjust the position in height, such as, for example, of the planks to drawing, the chambers black films, of the apparatus to rays chi, tables and of the chairs, this result being obtained with the aid of a single column carrying the object to be displaced