After a time the flow is reversed,the newly heated bricks being used to preheat the air and gas, while the exhaust reheats the checker chambers which have cooled during the first phase.
英
美
释义
间隔一段时问,气流改变方向,利用新加热的格子砖来预热空气和煤气,而废气又把前一阶段已冷却下来的蓄热室再加热。
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