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。
The fuel used for heating is either furnace gas or coke oven gas. Thecombustion air is always preheated to improve fuel utilization.
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。
The fuel used for heating is either blast furnace gas or coke oven gas. The combustion air is always preheated to improve fuel utilization.
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