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[ FLUID FILTERS ]

GAS MIXING APPARATUS FOR USE IN THE MIXING OF GASES FOR VARIETIES OF INDUSTRIAL OR OTHER USES; PRESSURE REGULATORS FOR ASSOCIATED USE AS A PART THEREOF OR THEREWITH; APPARATUS DESIGNED TO DISSIPATE AND PROTECT AGAINST EXPLOSIONS OF SUCH FIXED MIXTURE OF GASES; AND MECHANICAL APPARATUS OF VARIOUS ASSEMBLED PARTS AS NEED REQUIRES FOR THE AUTOMATIC AND SEMI-AUTOMATIC HANDLING AND CONVEYING OF WORK MATERIALS TO AND FROM PLACES WHERE THE WORK ON THEM IS PERFORMED

FLUID FUEL BURNERS FOR INDUSTRIAL USES AND PARTS THEREFOR; INDUSTRIAL HEATING EQUIPMENT ELEMENTS USING GASEOUS FUEL-NAMELY, FURNACES, KILNS, OVENS, DRYERS, LEHRS, AND HEAT TREATING MACHINES FOR USE IN HEATING METAL BODIES, FOR HARDENING AND ANNEALING PURPOSES AND PREPARATORY TO FORGING AND OTHER METAL WORKING OPERATIONS, AND PARTS OF SAID ELEMENTS