| 摘要 |
PURPOSE: A flue joining device and multiple flues using the flue joining device are provided to prevent high-temperature heat from leaking from the flue by varying the shape of a flange unit. CONSTITUTION: A flue joining device(200) is composed of an inner tube(210) including a flange unit(211), and a reverse U-shaped band(220). The flange unit has a hook-shaped head unit(211a), and a vertical unit(211b). The reverse U-shaped band is in contact with the top of the head unit.
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