要从发热值高的角度选择炉内燃烧的燃料，才能发出最大的热量。
The fuels which are burned in the furnace are selected for their high calorific value, and give the maximum amount of heat.
与燃料的发热值直接有关的是质量而不是容积。
The energy content of fuels is directly related to the mass and not volume.
与燃料的发热值直接有关的是质量而不是容积。
The energy content of fuels is directly related to the mass and not volume.
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