PACKING AND FILLING MATERIALS AND DEVICES FOR USE IN INDUSTRIAL AND CHEMICAL PLANTS AND INSTALLATIONS AND IN SCIENTIFIC AND LABORATORY APPARATUS, MORE PARTICULARLY FOR INTERNAL USE IN TOWERS AND COLUMNS USED FOR TREATMENT OF LIQUIDS AND GASES AND FOR MASS TRANSFER BETWEEN LIQUID AND GAS PHASES, SUCH MATERIALS AND DEVICES COMPRISING TOWER PACKINGS IN RANDOM OR STACKED FORM, INCLUDING PALL RINGS, RASCHIG RINGS, LESSING RINGS, PARTITION RINGS, AND SADDLES, AND DISTRIBUTOR, SIEVE, VALVE, SPACING AND DIVIDING TRAYS AND INTERNAL TOWER COMPONENTS, ALL MADE OF PLASTIC, GLASS, CERAMICS, METELS OR METAL ALLOYS IN VARIOUS SHAPES AND SIZES