发明申请
US20070234974A1 Fired heater and flue gas tunnel therefor 审中-公开
燃烧加热器和烟气管道

Fired heater and flue gas tunnel therefor
摘要:
An improved fired heater having one or more flue gas tunnels installed in the firebox floor such that at least most of the lateral cross section of the flue gas tunnel is below the firebox floor.
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