Extendable tunnel-type covering device, comprising a plurality of bow-shaped support elements (13) able to slide between a first position, wherein they define a first open condition of the cover, and a second position wherein they define a second closed co...

Canvas cover (10) to close the bodies (11) of trucks (12) including at least a base plane (11c), two lateral sides (11a) and a front wall (11b), said cover (10) comprising at least a canvas (14) associated with relative supporting elements (13) the ends (1...