A thermal solar system including a collector that is connected to a heat sink, in particular a heat storage medium, by way of a solar circuit containing a heat exchange medium. A conveyor belt can be driven stably without causing irregularity in a speed of the conveyor belt. The proppant or proppant-abrasive mixture can be combined into a three-dimensional matrix supported by a vitrified bond. The observational data may be stored in the memory as one or more data structures called \u201ctags. Using blasting to form the nodules produces an inferior coating in contrast to the electroless nickel boron coatings having a columnar structure. Shaping elements are arranged and designed such as to be capable of changing the shape of the part of the band that is in contact with the snow-surface during work.