Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes, namely, flashlights, electric boilers, gas cooktops, cooking ovens, freezers, light diffusers, showers, water fountains, cooking stoves, barbecue grills, hot plates; standing lamps; lamps; wall lamps; sinks; wash basins being parts of sanitary installations; bath tubs, toilet bowls, bidets