... which are made of concrete, steel, wood and plastic. Widely employed ... power plant, sintering plant coal gas factory, fertilizer plant, chemicals plant, aluminium plant, alkali factory, steel works, coking plant, ... plant,4.concrete plant,5.foundry plant,6.fertilizer plant,7.coking plant,8.gas plant,9.chemical plant,aluminium manufacture,10.alkali plant,11.steel plant,12.feed processing plant ...