Set units of toilet bowl and seat; dryers for use in chemical processing; recuperators, for chemical processing; steamers for chemical processing; evaporators for chemical processing; distillers for chemical processing; heat exchangers for chemical processing; milk sterilizers; industrial furnaces; nuclear reactors; atomic piles; forage drying apparatus; industrial boilers; air-conditioners for industrial purposes; freezers; clothes drying machines for industrial purposes; industrial dish drying machines; dish disinfectant apparatus for industrial purposes; tap water faucets; plumbing fixtures in the nature of level controlling valves for water tanks and pipeline cocks; waste water treatment tanks for industrial purposes, septic tanks for industrial purposes; garbage incinerators for industrial purposes; garbage incinerators for household purposes; solar water heaters; water purifying apparatus; electric lamps and lighting fixtures; gas water heaters for household use; non-electric cooking gas stoves for household purposes; electric kitchen stove worktops; kitchen sinks; non-portable ice chests for household purposes; ice-cooling refrigerators for household purposes; household tap-water filters; bathtubs; standing paper lanterns; portable paper lanterns; gas lamps; oil lamps; lamp chimneys; non-electric warming pans; non-electric pocket warmers; hot water bottles for warming one's feet in bed; toilet stool units with a washing water squirter; disinfectant dispensers for toilets; toilet bowls; seats for use with Japanese style toilet bowls; waste water treatment tanks for household purposes; septic tanks for household purposes; heating and cooling packs filled with chemical substances ready to react when required not for medical purposes; nail art performing machines and apparatus in beauty parlor