73549920
Jul 25, 1985
Jan 27, 1987
EQUIPMENT USED FOR DISTILLATION, ABSORPTION, AND LIQUID EXTRACTION IN THE CHEMICAL, PETROCHEMICAL AND PETROLEUM REFINING INDUSTRIES; NAMELY TRAYS, RANDOM TOWER PACKING, HIGH EFFICIENCY PACKING AND [ CASCADE MINI-RINGS ] * RANDOM AND STACKED COLUMN PACKINGS WITH LOW ASPECT RATIO *
Environmental Control Apparatus