73793725
Apr 17, 1989
Feb 6, 1990
METALLURGICAL INJECTOR MACHINES AND PARTS THEREOF FOR INTRODUCING TREATMENT SUBSTANCES INTO HIGH TEMPERATURE LIQUIDS OR MOLTEN METALS
MachinerySHAPED REFRACTORY ARTICLES OF CONCRETE OR REFRACTORY MATERIAL AND REFRACTORY CEMENTS FOR USE IN THE MACHINES OF INTRODUCING TREATMENT SUBSTANCES INTO HIGH TEMPERATURE LIQUIDS, MELTS OR INTO MOLTEN METALS
Nonmetallic Building Materials