A composition including HCl, urea, complex substituted keto-amine-hydrochloride, an alcohol, an ethoxylate, and a ketone is provided in a method for solubilizing calcium carbonate in an aqueous suspension or dispersion of calcium carbonate. Said assembly is positioned in the housing and is encapsulated with a curing, electrically insulating molding compound. Therefore, a phase of a reflected wave can be easily adjusted, thereby improving a performance of the antenna. , a spray dried dispersion or a hot melt extrusion. The trackball device is configured to make an attractive force generated between the reed switch and permanent magnet affect the rotation of the rollers.