The fuel used for heating is either blast furnace gas or coke oven gas. The combustion air is always

中文解释

用来加热的燃料不是高炉煤气就是焦炉煤气。燃烧用风通常要预热,以提高燃料的利用率。一种能承受高热的砂岩,用作炉边。

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