... for silos and hoppers which are made of concrete, steel, wood and plastic. Widely employed in coal mine, ... , fertilizer plant, chemicals plant, aluminium plant, alkali factory, steel works, coking plant, pharmaceutical factory, mine, dock, foodstuff & feedings ... 9.chemical plant,aluminium manufacture,10.alkali plant,11.steel plant,12.feed processing plant,13.pharmaceutical factoryetc. industrial ...