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Down-fired reforming furnaces; Refractory furnace tunnels for down-fired reforming furnaces

Refractory blocks, not of metal, specially designed to control flue gas flow; Refractory bricks, not of metal, specially designed to control flue gas flow; Refractory construction materials, not of metal, specially designed to control flue gas flow; Refractory shapes, not of metal, specially designed to control flue gas flow; Ceramic bricks for use in refractory furnaces, specially designed to control flue gas flow; Ceramic shapes for use in refractory furnaces, specially designed to control flue gas flow