FINISHED ALLOY CASTINGS FOR USE IN THE MANUFACTURE AND REPAIR OF VACUUM CLEANERS

VALVES AND PARTS OF VALVES-NAMELY, GLOBE STOP VALVES, ANGLE STOP VALVES, NON-RETURN VALVES, CHECK VALVES, BLOW-OFF VALVES, GATE VALVES, VALVES FOR CONTROLLING FLUID FLOW AT HIGH PRESSURES, VALVES FOR CONTROLLING FLUID FLOW AT HIGH TEMPERATURES, AND IN GENERAL, VALVES FOR CONTROLLING THE FLOW OF FLUIDS UNDER PRESSURE

CHEMICAL COMPOSITION USED IN PRODUCING AN ADHERENT COATING UPON ALUMINUM AND ALLOYS OF ALUMINUM