74613112
Dec 20, 1994
May 28, 1996
metallurgical furnaces; metallurgical shaft furnaces; electrically operated melting furnaces; electrical arc furnaces; parts for metallurgical furnaces, namely charging shafts, furnace linings, charging means, burners, and burner lances; water cooling systems, comprising water pipes, valves and conduits; gas exhaustion systems comprising gas pipes, fans, compressors and valves for metallurgical furnaces; dust extraction systems comprising dust extraction pipes, dust separation facilities, dust pipes, dust filters, dust collection silos and cyclones for metallurgical furnaces
Environmental Control Apparatus