干燥中所需空气的体积——将热传给食品使所含水分汽化所需要的空气量要多于将蒸汽运走离开干燥室所需要的空气量。
Volume of air required in Drying-More air is required to conduct heat to the food to evaporate the water present than is needed to transport the vapor from the chamber.
把已经喷雾过的奶颗粒，通过压进干燥室的热空气干燥成奶粉。 收藏。
The milk particle thus sprayed are evaporated into milk powder by heated air forced into the chamber.
天然气是燃烧来加热干燥室的燃烧室的空气的。
Natural Gas is burnt to heat up air in the combustion chamber of the drying room .
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