40 47 00 Refractories

40 47 16 Alumina Refractories

40 47 13 Silica Refractories 40 47 16 Alumina Refractories 40 47 19 Carbon and Graphite Refractories 40 47 23 Castable Refractories 40 47 26 Rammed Refractories 40 47 29 Refractory Concrete

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