The present invention relates to the use of hyaluronic acid for the preparation of compositions intended for improving the protective function of the skin, the eye and the mucous membranes, in particular of the upper and lower airways and the intestinal mucosa. Additionally, the invention relates to the use of a treatment for diseases and conditions that are associated with IGM, IGT or IFG. The invention is particularly applicable to domestic pressure cookers. Thereby, the impact particles repeat the cycle of falling upon the lower surface and a damping oscillation motion is created. Each key strip defines a first slot in which each cantilever plate is received. A stopper is provided in the plunger member, and the position of vertical motion of the stopper is switched by means of a rectilinear actuator, thereby switching rotational operation of the dial knob between an enabled state and a disabled state.