台车式电阻炉的外壳呈圆筒状，内部是由耐火砖砌成的竖井式炉膛，所以台车式电阻炉因此而得名。
The shell of the trolley type resistance furnace is cylindrical, and the inside is a vertical shaft furnace made of refractory bricks.
火焰式加热炉有两种基本类型：水平管箱式加热炉和立管圆筒形加热炉(图)。
Fired heaters come in two basic styles: horizontal-tube box - type heaters and vertical -tube cylindrical heaters Fig.
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