A bed lifting system is provided for lifting a bed above a surface. This may be accomplished using a steering system, a speed control system and an integration device that are configured to work together to provide correct steering in forward and reverse, and, in some embodiments, to reduce the speed of the outboard drive wheel of the vehicle when it enters an extreme turn under constant speed input. A roller at a second closing element extends behind a first closing element. 1 to 105 Am2 of unit surface area from pinch rolls 2 to rolls 6 or apron guides 7 on the outlet side of a hot rolling mill 1 andor by injecting cooling water at a pH value of 2 to 4 onto the metallic material 11 from cooling headers 4 and apron guides 7.