73447407
Oct 11, 1983
Aug 19, 1986
INDUSTRIAL COAL-FIRED FURNACES, INDUSTRIAL OIL-FIRED FURNACES, INDUSTRIAL GAS-FIRED FURNACES, FLUIDIZED BED REACTORS, HEAT EXCHANGERS USED IN METALLURGICAL AND COMBUSTION PROCESSES AND CLEANERS OF GASES FORMED IN METALLURGICAL AND COMBUSTION PROCESSES
Environmental Control Apparatus