The utility model can evenly heat the outer surface of the ash bucket so as to ensure the temperature on the outer surface of the ash bucket stay the same.
本实用新型能够对灰斗外表面进行均匀加热，使灰斗外表面的温度保持一致。
Medium temperature box adopts enclosed fire pot. The spiral heating component made by electric heated alloy wire coil all around of furnace pot. It has functions of evenly loss heat and long use life.
中温箱式采用封闭型炉膛，以电热合金丝为发热元件制成螺旋形后盘绕于炉膛四壁之中，散热时炉温均匀，延长了使用寿命。
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