The invention concerns a mobile providing a displacement for controlling the object to be covered moving in a horizontal plane on a conveyor or the like, and at the free end of which is mounted a sprayer. The return yoke layer is disposed on a trailing side of the pole layer, and a neck height NH is within a range of NHW1 0. Such factors may include: the presence of an enemy-type character in the region; the presence of a nearby object in the region that can be used to seek cover; and a determination whether the player character’s behavior is consistent with a decision to seek cover. To make a simple and inexpensive connection between the housing part and the water tank parts an edge of the housing part, an edge of the top part of the water tank and an edge of the bottom part of the water tank are connected to each other in a single process step by means of mirror welding. The said gelatins contain anionic or nonionic surfactant compounds.