72402220
Sep 8, 1971
Feb 10, 1976
CHEMICAL PRODUCTS-NAMELY, ALUMINUM CHEMICALS, ZIRCONIUM CHEMICALS, MAGNESIUM POWDERS AND ALUMINA, NOT FOR USE IN CONNECTION WITH DYES
Metal GoodsSHAPED REFRACTORY LININGS FOR FURNACES AND FOR KILNS, PARTS AND FITTINGS FOR INDUSTRIAL FURNACES, AND KILNS WITH ALL SUCH LININGS, PARTS AND FITTINGS BEING MADE OF REFRACTORY MATERIALS[; INSTALLATIONS AND APPARATUS FOR HEATING, VENTILATION AND WATER SUPPLY]
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