Pipe joints of metal; junctions of metal for pipes; metal pipes and fittings therefor

Air conditioners for household or industrial purposes; air heating apparatus for household or industrial purposes; air cooling apparatus for household or industrial purposes; ventilation (air-conditioning) apparatus for household or industrial purposes; air purifiers for household or industrial purposes; air dehumidifier for household or industrial purposes; air humidifier for household or industrial purposes; specialized parts designed to be used with the aforementioned products, namely, junctions of metal for pipes and pipe joints of metal specifically designed to be used for the installation of aforementioned products