... fences, scaffolding, indoor decorations, ducts, ventilating pipes, steel frames and cable trays 2- Electrical appliances: Such as ... case,video,freezers,lighting fittings, water heaters, washing machine,stoves, air conditioners, dehumidifiers, fluorescent light housings, ... machines, solar collectors, office equipment, steel furniture, tool boxes, garages and waste bins Galvanizing steel sheet