72124540
Jul 24, 1961
Jul 3, 1962
REFRACTORIES FOR FURNACES-NAMELY, KILN FURNITURE, HEAT TREATING FURNACE PARTS, METAL MELTING FURNACE PARTS, FURNACE HEARTHS, FURNACE LININGS, BURNER BLOCKS, TAP-OUT BLOCKS, HEARTH SUPPORTS, AND PROTECTIVE TUBES FOR THERMOCOUPLES
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