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The firebox is full of smoke, the fire needs more air?
火箱子全是烟，还需要更多空气助火势？
youdao
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Firebox using automatic intelligent control system of manual control system.
燃烧室采用全自动智能化控制手动控制，控制温度精确。
youdao
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Firebox using automatic intelligent control system of manual control system.
燃烧室采用全自动智能化控制手动控制，控制温度精确。
youdao