Apparatus for training and tennis practice. (Machine-translation by Google Translate, not legally binding)

摘要

Apparatus for training and practice of tennis, which essentially is characterized by comprising a frame based on three sections in u, presenting the upper and lower ends of the vertical sections two short sections each provided with an alignment of holes, in which they position the ends of some springs integral at their other ends of the corresponding vertices of a square foam board, preferably 20 cm. Of thickness, further characterized in that the u-frame is secured at the bottom of two parallel support bars, between which it is possible to place a foam platform, preferably 20 cm. Thick. (Machine-translation by Google Translate, not legally binding)