| http://www.w3.org/ns/prov#value | - ntrol device means the air pollution control equipment used to remove particulate matter from the effluent gas stream generated by a metal melting furnace.Cupola means a vertical cylindrical shaft furnace that uses coke and forms of iron and steel such as scrap and foundry returns as the primary charge components and melts the iron and steel through combustion of the coke by a forced upward flow o
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