The method comprising the steps of moving the parts on the belt into a chamber of the furnace, heating the parts, igniting the unused combustible atmosphere above the parts, and allowing {HEAD ~ the atmosphere} above the parts to escape through {TAIL ~ a vent} in the chamber 
to escape through
The method comprising the steps of moving the parts on the belt into a chamber of the furnace , heating the parts , igniting the unused combustible atmosphere above the parts , and allowing { HEAD ~ the atmosphere } above the parts to escape through { TAIL ~ a vent } in the chamber
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