open-hearth
A. gas and air enter B. pre-heated chamber C. molten pig iron D. hearth E. heating chamber (cold) F. gas and air exitThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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