All goods in this class including melting equipment and equipment for smelteries, namely hot and cold blast cupola furnaces, air heaters, radiation recuperators, convection recuperators, fixed, tilting and movable ladles, apparatuses for smelteries; machines and apparatuses for air treatment, namely whirling water spray collectors, water spray collectors, laminae settling chambers, centrifugal settling chambers, suction-hose filters, dust catchers, pipe lines, steel supporting frameworks