A method of snow plough from a site using a snowplough with at least two plough blades forming together a ploughing angle and there being on the ploughing site fixed objects, such as airport lamps, rising over the site surface. The functional ingredient comprises an electrostatically charge ingredient, preferably selected from the group consisting of electrostatically charged proteins, amino acids, conjugated proteins, dipeptides, multipeptides, protein colloids, enzymes, protein hydrolysates, natural and artificial food additives, flavorings, seasonings, and mixtures thereof. The reported information is used to compute a position of the selected mobile unit. This provides an incentive to the player to play the highest required number of paylines. The microporous has at least one internal passageway and an interface tube attached to the microporous plate in flow communication with the internal passageway. An engaging portion which is engageable with a lower frame is formed on the fixing surface or an edge portion which forms the fixing surface.