A method is described for characterizing defects on a test surface of a semiconductor wafer using a confocal-microscope-based automatic defect characterization system. An elastic element is received in the elastic-element receiving portion to make the slide block slide to a position effecting tight engagement of the battery lid with the lower cover. The heated fluid is then passed to the insulated fuel cell in order to increase the temperature of the same, typically to a temperature at or near the temperature of the ambient environment. A clutch unit is provided for selectively engaging gearing of the planetary gear set. The software objects are for associating with the computer program to enable operation of the game of chance. Said valve comprises a valve body, provided with a valve body seat and a valve needle, guided over a guiding length in said valve body within a stationary circular cylindrical guiding surface and provided with a valve needle seat for controlling a spray orifice.