open-hearth furnace
柯林斯词典
1. N (esp formerly) a steel-making reverbatory furnace in which pig iron and scrap are contained in a shallow hearth and heated by producer gas (曾经的)马丁炉
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1. N (esp formerly) a steel-making reverbatory furnace in which pig iron and scrap are contained in a shallow hearth and heated by producer gas (曾经的)马丁炉