When an operator operates an operation tool of a dimming operation terminal device in order to set the brightness of a lighting load to desired brightness, an energization electric signal, for example, a voltage level detected by a dimming control section changes. The pouring nozzle is provided with two bearing faces forming with the pouring channel an angle \u03b2 of 20\xb0 to 80\xb0. Preferably, the molten mixture is cooled by depositing it on a chilled surface such that it forms a layer between about 120 and about 300, and preferably between about 120 and about 150, microns thick. Although, the cover is generally designed to drop over the top of the water craft such that the hull of the craft is exposed, it may also be used in the reverse manner such that the cover is dropped over the hull of the water craft when the craft is stored upside down. When the rotating base is located at the using position, the first ventilation opening is retracted in the first body.