An acoustic projection screen includes a screen base and a carbon nanotube layer. A vertical supply path is formed by placing a vertical drain material in ground in the periphery of ground to be improved, and water containing a water stop material is charged in the vertical supply path to supply the water containing the water stop material to the ground through the vertical supply path. The mounting body includes an upper section or base, along with a first leg and a second leg that each extend downwardly from the base in at least generally diverging relation to one another. The radiation emitted by the components in their respective main emission directions is deflected at least in part in the direction of the aperture by means of the structured reflector surface. If a customer has chosen a high bandwidth for service, the customer will be included in a calendar which is serviced more often than if the customer has chosen a lower bandwidth. The first and second contact pairs may also be arranged in a parallel configuration for increasing an amperage rating of the circuit breaker.