A transport refrigeration system generally includes a support structure, a heat exchanger, and at least two pairs of mounts for mounting the heat exchanger to the support structure. The prosthetic connection element is of biocompatible material and forms part of the foot or is connected or connectable to this latter, and includes a body provided with a flat surface intended to rest on the footplate and having an area sufficient to prevent reabsorption of the footplate osseous tissue as a result of the pressure which the ossicular prosthesis exerts on the footplate. The transducer includes a two-dimensional transducer element matrix array formed by a plurality of individually controllable transducer elements. The sheet is realized in a flexible material in such a manner that, when the sheet slides forward to separate the first product, the sheet assumes a curved configuration and while during the following return stage, the sheet reassumes its flat configuration.