Abstract: For the construction of synthetic grass playing fields, a plurality of panels (1, 1?, 1?) are manufactured by injection molding and stacked in groups (50). Each stacked group (50) is placed on a distributor vehicle (90) moved along a covering direction (Z), so that the panels (1) which compose the group (50) are able to rotate relative to each other with respect to a main direction (X) orthogonal to the covering direction (Z), so that a row of panels is constructed.

Abstract: Antiskid device (1) for vehicles including a band (2), made of fabric (7), suitable for surrounding at least the tread (13) of a vehicle tire and mounting means (10), associated with said band (2), for maintaining it in position around the tread (13). Such device (1) is characterized in that the band (2) presents engagement means (8) in correspondence with at least a portion of an outer surface (4) thereof, directly carried out through the fabric (7) of the band (2), for increasing the friction between the tire and the road. In particular, such means (8) include relief ribbing (9) arranged according to an angle lower than 30° with respect to the direction perpendicular to the rolling direction of the wheel (14).