Class [11]
Environmental Control Instrument Products lighting heating cooling cooking
Deep fat friers (Electric -);Deep fat fryers;Deep fat fryers (Electric -);Deep freezers;Deep freezing apparatus;Deep freezing installations;Deep fryer, electric;Deep fryers;Deep fryers, electric;Domestic boilers;Domestic cooking ovens;Domestic deep fryers [electric];Domestic frying pans [electric];Domestic gas cookers;Domestic gas fires;Domestic gas lighters;Domestic heating utensils;Domestic hot plates;Domestic ovens;Domestic plate warmers;Domestic pressure cookers [electric];Domestic radiators;Domestic refrigerators;Domestic rotisseries [electric];Domestic stoves;Domestic water filtering units;Doors for refrigerators;Dough proving apparatus;Dough retarding apparatus;Downlighters;Downlights;Drain pans specially adapted for water heaters to protect from condensation, leaks, and overflow;Draught accelerators;Draught dampers for inhibiting the spread of fire;Draught dampers for inhibiting the spread of flames;Draught dampers for inhibiting the spread of fumes;Draught dampers for inhibiting the spread of gases;Draught dampers for inhibiting the spread of smoke;Draught dampers for inhibiting the spread of vapours;Draught dampers for preventing the spread of fire;Draught dampers for preventing the spread of flames;Draught dampers for preventing the spread of fumes;Draught dampers for preventing the spread of gases;Draught dampers for preventing the spread of smoke;Draught dampers for preventing the spread of vapours;Draught regulators for inhibiting the spread of fire;Draught regulators for inhibiting the spread of flames;Draught regulators for inhibiting the spread of fumes;Draught regulators for inhibiting the spread of gases;Draught regulators for inhibiting the spread of smoke;Draught regulators for inhibiting the spread of vapours;Draught regulators for preventing the spread of fire;Draught regulators for preventing the spread of flames;Draught regulators for preventing the spread of fumes;Draught regulators for preventing the spread of gases;Draught regulators for preventing the spread of smoke;Draught regulators for preventing the spread of vapours;Drawers for refrigerators;Drier cabinets;Driers (Air -);Driers for refrigeration systems;Driers (Hair -);Drinking fountains;Drinking water filters;Drinking water (Filters for -);Drinking water supply apparatus;Drinking water supply installations;Drip irrigation emitters [irrigation fittings];Drip irrigation systems;Dry ice machines;Dryers (Air -);Dryers for the face using warm air;Dryers for the hands using a warm air drying stream;Dryers (Hair -);Drying apparatus;Drying apparatus and installations;Drying apparatus for chemical processing;Drying apparatus for fodder and forage;Drying cabinets;Drying installations;Drying machines for agriculture;Drying ovens;Drying shelves;Drying shelving;Dust cyclone filters;Dust filters;Dynamo lights for vehicles;Off-road light bars for vehicles;Oil burners;Oil cooking stoves [for household purposes];Oil fired boilers;Oil fired heaters;Oil lamps;Oil lanterns;Oil pre-heaters;Oil purifying installations;Oil stoves;Oil stoves [space heaters for household use];Oil-filled radiators;Oil-free electric fryers;Oil-scrubbing apparatus;Opaque casings for lamps;Opaque casings for lights;Operating levers for water closet cisterns;Organic light emitting diodes (OLED) lighting devices;Organic positive self-temperature control plane heaters;Ornamental fountains;Ornaments for christmas trees [lights];Outdoor electrical lighting fixtures;Outdoor lighting;Outdoor lighting fittings;Outdoor showers for bathing;Oven fittings made of fireclay;Oven gas igniters;Oven ventilator hoods;Ovens;Ovens for the treatment of waste;Ovens for use in the electronics industry;Ovens (Microwave -) for industrial purposes;Ovens, other than for laboratory use;Ovens (Shaped fittings for -);Ovens utilising air frequency fields for cooking;Ovens utilising air frequency fields for drying purposes;Overhead lamps;Overhead showers;Overlying bed ovens for bakeries;Oxyhydrogen burners;Waffle irons;Waffle irons, electric;Walk-in coolers;Walk-in freezers;Walk-in refrigerators;Wall lamps;Wall lights;Wall lights (fittings for -) [other than switches];Wall-mounted spouts for baths;Wall-mounted spouts for bidets;Wall-mounted spouts for sinks;Wall-mounted spouts for wash-hand basins;Wallpaper steamers;Walls for shower cabins;Walls for shower cubicles;Warm air dryers for use in drying hair;Warm air hand dryers;Warm air heating apparatus;Warmers [not for medical use];Warming drawers for kitchens;Warming pans;Warming pans for beds;Warming pans, non-electric;Warming stations;Warming trays;Wash basin stoppers;Wash basins [parts of sanitary installations];Wash boilers;Wash bowls [parts of sanitary installations];Wash fountains;Washers for water faucets;Washers for water taps;Wash-hand basins [parts of sanitary installations];Wash-hand bowls [lavatory] parts of sanitary installations;Wash-hand bowls [parts of sanitary installations];Washing coppers;Washrooms (Hand drying apparatus for -);Washstand lamps;Waste assemblies for basins;Waste assemblies for baths;Waste disposal furnaces;Waste disposal incinerators;Waste fittings for basins;Waste fittings for baths;Waste fittings for sanitary ware;Waste incinerators for household purposes;Waste incinerators for industrial purposes;Waste pipes for bathtubs;Waste pipes for sanitary installations;Waste water purification installations;Waste water purification units;Waste water treatment tanks;Waste water treatment tanks for household purposes;Wastewater purification units;Wastewater treatment installations;Wastewater treatment tanks for household purposes;Wastewater treatment tanks for industrial purposes;Water bed heaters;Water boilers;Water chillers;Water cisterns;Water closet seats;Water closets;Water closets incorporating douches;Water conditioning apparatus;Water conditioning installations;Water conditioning units;Water conduits installations;Water control valves;Water control valves for faucets;Water control valves for water cisterns;Water control valves [level controlling] in cisterns;Water coolers;Water coolers and heaters;Water cooling apparatus;Water cooling installations;Water cooling towers;Water desalinating apparatus;Water desalinating apparatus utilizing reverse osmosis;Water desalination plants;Water disinfection apparatus;Water dispensers;Water distillation units;Water distilling units;Water distributing apparatus [automatic];Water distribution installations;Water distributor armatures for heating;Water faucet spout;Water faucets;Water filtering apparatus;Water filtering apparatus for domestic use;Water filtering apparatus for industrial use;Water filtering installations;Water filtering units;Water filtering units for aquariums;Water filters;Water filters for household purposes;Water filters for industrial purposes;Water filters [installations] for agricultural purposes;Water filters [machines] for agricultural purposes;Fabric steamers;Face saunas;Facial sauna apparatus;Facial saunas;Fairy lights for festive decoration;Fairy lights for festive decorations;Fan heaters;Fans [air-conditioning];Fans (Electric -) for personal use;Fans for air conditioning apparatus;Fans for exhaust extractors;Fans for fume extractors;Fans for gas extractors;Fans for hair drying;Fans for use in air conditioning;Fans for ventilating;Fans [parts of air-conditioning installations];Faucet aerators;Faucet filters;Faucet filters [plumbing fittings];Faucet handles;Faucet sprayers;Faucets;Faucets for pipes;Faucets for pipes (Am.);Faucets for pipes and pipelines;Feed water heaters [for industrial purposes];Feeding apparatus for heating boilers;Feeding bottle heaters;Feeding bottles (Heaters, electric, for -);Fiber optic illuminators;Fiber optic lighting fixtures;Fiber optic lighting installations;Fibre optic lighting fixtures;Filaments, electric (Heating -);Filaments for electric lamps;Filaments (Magnesium -) for lighting;Film stage lighting apparatus;Film stage lighting installations;Filter apparatus for water supply installations;Filter boxes for water purification;Filter elements for the air vents of water supply tanks;Filter elements for the overflows of water supply tanks;Filter-motor combinations for aquariums;Filters (Coffee -), electric;Filters for air conditioners;Filters for air conditioning;Filters for air extractor hoods;Filters for air purifiers;Filters for aquaria;Filters for aquariums;Filters for cleaning air;Filters for cleaning gases [parts of household or industrial installations];Filters for drinking water;Filters for dust;Filters for exhaust extractors [parts of household or industrial installations];Filters for fume extractors;Filters for gas extractors;Filters for gases [household or industrial installations];Filters for ice making apparatus;Filters for ice making machines;Filters for illumination apparatus;Filters for illumination appliances;Filters for industrial and household use;Filters for industrial installations;Filters for lighting apparatus;Filters for lighting apparatus and instruments;Filters for lighting appliances;Filters for ponds;Filters for refrigeration systems;Filters for sanitary water distribution apparatus;Filters for stage lighting;Filters for swimming pools;Filters for use in aquariums;Filters for use with apparatus for air conditioning;Filters for use with apparatus for sanitary purposes;Filters for use with apparatus for steam generating;Filters for use with apparatus for ventilating;Filters for use with apparatus for water supply;Filters for use with apparatus heating;Filters for use with lamps;Filters for use with lighting apparatus;Filters for use with lighting apparatus and instruments;Filters for use with swimming pools;Filters for use with torches;Filters for waste gas purification;Filters for wastewater;Filters for water purifiers;Filters for water release devices;Fire grate fronts (Domestic -);Fire grates (Domestic -);Fire grates (Domestic -) of metal;Fire hydrants;Fire pits;Fire ventilators for exhausting fumes;Fire ventilators for exhausting gases;Fire ventilators for exhausting smoke;Fire ventilators for exhausting vapours;Firegrates [domestic];Fireplace fenders;Oven fittings made of fireclay;Ovens;Ovens for use in the electronics industry;Ovens (Shaped fittings for -);Boilers;Boilers being parts of central heating installations;Boilers for central heating installations;Boilers for heating installations;Boilers for hot water supply installations;Boilers for use in heating systems;Boilers, other than parts of machines;Fabric steamers;Face saunas;Facial sauna apparatus;Facial saunas;Fairy lights for festive decoration;Fairy lights for festive decorations;Fan heaters;Fans [air-conditioning];Fans (Electric -) for personal use;Fans for air conditioning apparatus;Fans for exhaust extractors;Fans for fume extractors;Fans for gas extractors;Fans for hair drying;Fans for use in air conditioning;Fans for ventilating;Fans [parts of air-conditioning installations];Faucet aerators;Faucet filters;Faucet filters [plumbing fittings];Faucet handles;Faucet sprayers;Faucets;Faucets for pipes;Faucets for pipes (Am.);Faucets for pipes and pipelines;Feed water heaters [for industrial purposes];Feeding apparatus for heating boilers;Feeding bottle heaters;Feeding bottles (Heaters, electric, for -);Fiber optic illuminators;Fiber optic lighting fixtures;Fiber optic lighting installations;Fibre optic lighting fixtures;Filaments, electric (Heating -);Filaments for electric lamps;Filaments (Magnesium -) for lighting;Film stage lighting apparatus;Film stage lighting installations;Filter apparatus for water supply installations;Filter boxes for water purification;Filter elements for the air vents of water supply tanks;Filter elements for the overflows of water supply tanks;Filter-motor combinations for aquariums;Filters (Coffee -), electric;Filters for air conditioners;Filters for air conditioning;Filters for air extractor hoods;Filters for air purifiers;Filters for aquaria;Filters for aquariums;Filters for cleaning air;Filters for cleaning gases [parts of household or industrial installations];Filters for drinking water;Filters for dust;Filters for exhaust extractors [parts of household or industrial installations];Filters for fume extractors;Filters for gas extractors;Filters for gases [household or industrial installations];Filters for ice making apparatus;Filters for ice making machines;Filters for illumination apparatus;Filters for illumination appliances;Filters for industrial and household use;Filters for industrial installations;Filters for lighting apparatus;Filters for lighting apparatus and instruments;Filters for lighting appliances;Filters for ponds;Filters for refrigeration systems;Filters for sanitary water distribution apparatus;Filters for stage lighting;Filters for swimming pools;Filters for use in aquariums;Filters for use with apparatus for air conditioning;Filters for use with apparatus for sanitary purposes;Filters for use with apparatus for steam generating;Filters for use with apparatus for ventilating;Filters for use with apparatus for water supply;Filters for use with apparatus heating;Filters for use with lamps;Filters for use with lighting apparatus;Filters for use with lighting apparatus and instruments;Filters for use with swimming pools;Filters for use with torches;Filters for waste gas purification;Filters for wastewater;Filters for water purifiers;Filters for water release devices;Fire grate fronts (Domestic -);Fire grates (Domestic -);Fire grates (Domestic -) of metal;Fire hydrants;Fire pits;Fire ventilators for exhausting fumes;Fire ventilators for exhausting gases;Fire ventilators for exhausting smoke;Fire ventilators for exhausting vapours;Firegrates [domestic];Fireplace fenders;Babies' bottle warmers;Baby bottle warmers;Baby food warmers;Backup lights for land vehicles;Bakers' ovens;Baking ovens;Baking ovens [for household purposes];Ball cocks for toilet tanks;Ball valves;Ballast water treatment systems;Barbecue apparatus;Barbecue cooking apparatus;Barbecue grills;Barbecue grills (Lava rocks for use in -);Barbecue smokers;Barbecue starters;Barbecues;Bases adapted for the mounting of lamps;Bases for non-electric lamps;Basin mixers [taps];Basin pillar taps;Basin taps;Basins being part of water supply installations;Bath armatures for water control;Bath boilers;Bath cubicles;Bath fittings;Bath fittings (Hot air -);Bath installations;Bath installations (Sauna -);Bath linings;Bath linings, fitted;Bath panels;Bath plumbing fixtures;Bath screens;Bath spouts;Bath taps;Bath tub jets;Bath tubs;Bath tubs for sitz baths;Bathroom basins [parts of sanitary installations];Bathroom heaters;Bathroom installations;Bathroom installations for sanitary purposes;Bathroom installations for water supply purposes;Bathroom sinks;Bathroom wash basins;Baths;Baths for use by the physically handicapped;Baths (Heaters for -);Baths incorporating air jets;Baths incorporating apparatus for assisting entry into the bath;Baths incorporating apparatus for assisting exit out of the bath;Baths (Spa -) [vessels];Bathtub enclosures;Bathtubs;Battery powered fluorescent emergency lighting units;Battery powered incandescent emergency lighting units;Battery-operated electric candles;Bed warmers;Bedside lamps;Beverage cooling apparatus;Beverage refrigerators for use in automobiles;Beverage refrigerators for use in cars;Beverage urns, electric;Beverage-cooling apparatus;Beverages cooling apparatus;Bibcocks [plumbing fittings];Bicycle dynamo lights;Bicycle lamps;Bicycle lights;Bicycle reflectors;Bicycle reflectors for attachment to spokes;Bidet taps;Bidets;Biological reactors for clarifying industrial effluents;Bioreactors for use in the treatment of waste;Bioreactors for use in the treatment of wastewater;Blankets, electric, not for medical purposes;Blast furnaces;Boat trailer lights;Bogie hearth furnaces;Boiler pipes [tubes] for heating installations;Boilers;Boilers being parts of central heating installations;Boilers for central heating installations;Boilers for heating installations;Boilers for hot water supply installations;Boilers for use in heating systems;Boilers, other than parts of machines;Book lights;Book sterilisation apparatus;Book sterilization apparatus;Book sterilizers;Bottle coolers [apparatus];Bottle heaters;Bottle warmers;Brackets for gas burners;Brake lights for vehicles;Braziers;Waffle irons;Waffle irons, electric;Walk-in coolers;Walk-in freezers;Walk-in refrigerators;Wall lamps;Wall lights;Wall lights (fittings for -) [other than switches];Wall-mounted spouts for baths;Wall-mounted spouts for bidets;Wall-mounted spouts for sinks;Wall-mounted spouts for wash-hand basins;Wallpaper steamers;Walls for shower cabins;Walls for shower cubicles;Warm air dryers for use in drying hair;Warm air hand dryers;Warm air heating apparatus;Warmers [not for medical use];Warming drawers for kitchens;Warming pans;Warming pans for beds;Warming pans, non-electric;Warming stations;Warming trays;Wash basin stoppers;Wash basins [parts of sanitary installations];Wash boilers;Wash bowls [parts of sanitary installations];Wash fountains;Washers for water faucets;Washers for water taps;Wash-hand basins [parts of sanitary installations];Wash-hand bowls [lavatory] parts of sanitary installations;Wash-hand bowls [parts of sanitary installations];Washing coppers;Washrooms (Hand drying apparatus for -);Washstand lamps;Waste assemblies for basins;Waste assemblies for baths;Waste disposal furnaces;Waste disposal incinerators;Waste fittings for basins;Waste fittings for baths;Waste fittings for sanitary ware;Waste incinerators for household purposes;Waste incinerators for industrial purposes;Waste pipes for bathtubs;Waste pipes for sanitary installations;Waste water purification installations;Waste water purification units;Waste water treatment tanks;Waste water treatment tanks for household purposes;Wastewater purification units;Wastewater treatment installations;Wastewater treatment tanks for household purposes;Wastewater treatment tanks for industrial purposes;Water bed heaters;Water boilers;Water chillers;Water cisterns;Water closet seats;Water closets;Water closets incorporating douches;Water conditioning apparatus;Water conditioning installations;Water conditioning units;Water conduits installations;Water control valves;Water control valves for faucets;Water control valves for water cisterns;Water control valves [level controlling] in cisterns;Water coolers;Water coolers and heaters;Water cooling apparatus;Water cooling installations;Water cooling towers;Water desalinating apparatus;Water desalinating apparatus utilizing reverse osmosis;Water desalination plants;Water disinfection apparatus;Water dispensers;Water distillation units;Water distilling units;Water distributing apparatus [automatic];Water distribution installations;Water distributor armatures for heating;Water faucet spout;Water faucets;Water filtering apparatus;Water filtering apparatus for domestic use;Water filtering apparatus for industrial use;Water filtering installations;Water filtering units;Water filtering units for aquariums;Water filters;Water filters for household purposes;Water filters for industrial purposes;Water filters [installations] for agricultural purposes;Water filters [machines] for agricultural purposes;Dampers for fires;Dampers for furnaces;Dampers for ventilating installations;Dampers [heating];Damping apparatus [parts of fires];Damping apparatus [parts of furnaces];Damping nozzles [parts of fires];Damping nozzles [parts of furnaces];Dashboard lamp bulbs;Decontamination chambers;Decontamination showers;Decorative electric lighting apparatus;Decorative fountains, sprinkler and irrigation systems;Decorative gas lighting;Decorative gas lighting sets;Decorative lighting;Decorative lighting for christmas trees;Decorative lighting sets;Decorative lights;Decorative table-top water fountains;Decorative water fountains;Deep fat friers (Electric -);Deep fat fryers;Deep fat fryers (Electric -);Deep freezers;Deep freezing apparatus;Deep freezing installations;Deep fryer, electric;Deep fryers;Deep fryers, electric;Deep frying machines;Defrosters for vehicles;Defrosting apparatus for vehicles;Defrosting windows of vehicles (Heating apparatus for -);Dehumidifiers;De-humidifiers;Dehumidifiers for commercial use;Dehumidifiers for household purposes;Dehumidifiers for household use;Dehydrating (Apparatus for -) food waste;Demisters;Dental ovens;Deodorant apparatus [not for personal use];Deodorising apparatus;Deodorising apparatus for dispensing scents in motor vehicles;Deodorising apparatus, not for personal use;Deodorizing apparatus, not for personal use;Depilatory wax heaters;Desalination apparatus;Desalination installations;Desalination plants;Desalination units;Desiccating apparatus;Desk lamps;Desk lights;Diesel fuel line heaters;Diffusers being parts of lighting apparatus;Diffusers being parts of lighting installations;Diffusers (Light -);Diffusion furnaces for industrial use;Direction indicator bulbs;Direction indicators for cycles (Lamps for -);Direction indicators for land vehicles (Lamps for -);Direction indicators for vehicles (Lamps for -);Directional lights for bicycles;Dirt pans [parts of fires or furnaces];Discharge lamps;Discharge tubes, electric, for lighting;Dish disinfectant apparatus for industrial purposes;Dish heaters;Dish sterilizers;Disinfectant apparatus;Disinfectant apparatus for banknote;Disinfectant apparatus for banknotes;Disinfectant apparatus for medical purposes;Disinfectant dispensers for toilets;Disinfectant dispensers for washrooms;Disinfectant distributors for toilets;Disinfecting apparatus;Disinfection apparatus;Display cabinets (Refrigerating -) [display cases];Display freezers;Display lighting;Disposable sterilization pouches;Distillation apparatus;Distillation apparatus for industrial use;Distillation apparatus not for scientific purposes;Distillation columns;Distillers [for chemical processing];Distillers for chemical processing;Diving lights;Dome lights for furniture;Domestic air conditioning apparatus;Domestic air conditioning installations;Domestic autoclave pressure cookers [electric];Domestic baby bottle warmers [electric];Domestic baby food warmers [electric];Domestic boilers;Domestic bread toasters [electric];Domestic coffee percolators [electric];Hair driers;Hair driers [dryers];Hair driers for use in beauty salons;Hair dryers;Hair dryers [for household purposes];Hair drying apparatus;Hair drying appliances;Hair drying machines for beauty salon use;Hair steamers for beauty salon use;Hair steamers for use in beauty salons;Hairdryers;Halogen architectural lighting fixtures;Halogen heaters;Halogen lamps;Halogen lamps for incorporation into electric cookers;Halogen light bulb;Halogen light bulbs;Halogen luminaires;Halogen stage lighting fixtures;Hand basins;Hand driers;Hand dryers;Hand drying apparatus;Hand drying apparatus for washrooms;Hand drying apparatus [heat drying];Hand drying apparatus incorporating blowers;Hand drying apparatus incorporating fans;Hand drying apparatus incorporating impellers;Hand held electric hairdryers;Hand held hair dryers;Hand held portable water purification apparatus;Hand held shower heads;Hand held showers;Hand rinse units;Hand sets being shower fittings;Hand showers;Hand warmers for personal use;Hand-held electric hair dryers;Hand-held showers;Handheld spotlights;Handwarmers [other than clothing];Hanging ceiling lamps;Hanging lamps;Hangings for lamps;Hardening furnaces for springs;Harvest drying apparatus;Harvest drying installations;Head torches;Headlamp bulbs;Headlamps for automobiles;Headlamps for use on automobiles;Headlamps for use on cycles;Headlamps for use on motor cycles;Headlamps for vehicles;Headlights;Headlights for automobile;Headlights for automobiles;Headlights for vehicles;Heads for showers;Hearths;Heat accumulators;Heat collectors;Heat exchangers;Heat exchangers for central heating purposes;Heat exchangers for chemical processing;Heat exchangers [for chemical processing];Heat exchangers for fireplaces;Heat exchangers for the removal of condensate;Heat exchangers for the removal of exhaust gases;Heat exchangers for the removal of flue gases;Heat exchangers for the temperature control of drinks being dispensed;Heat exchangers, not parts of machines;Heat exchangers, other than parts of machines;Heat generating apparatus;Heat generating filaments;Heat guns;Heat pads;Heat pads for warming;Heat pumps;Heat pumps for energy processing;Heat regenerators;Heat regulating devices [valves] being parts of heating installations;Heat sinks for use in cooling apparatus;Heat sinks for use in heating apparatus;Heat sinks for use in ventilating apparatus;Heat trace cables;Heated cabinets for foodstuffs;Heated cabinets for use in the food service industry;Heated carpets;Heated display cabinets;Heated display cases;Heated display units;Heated polymerisation units for dental restoration compounds;Heated towel drying rails;Heated towel rails;Heated trays;Heated trollies for keeping food warm;Heaters;Heaters, electric, for feeding bottles;Heaters for automobiles;Off-road light bars for vehicles;Oil burners;Oil cooking stoves [for household purposes];Oil fired boilers;Oil fired heaters;Oil lamps;Oil lanterns;Oil pre-heaters;Oil purifying installations;Oil stoves;Oil stoves [space heaters for household use];Oil-filled radiators;Oil-free electric fryers;Oil-scrubbing apparatus;Opaque casings for lamps;Opaque casings for lights;Operating levers for water closet cisterns;Organic light emitting diodes (OLED) lighting devices;Organic positive self-temperature control plane heaters;Ornamental fountains;Ornaments for christmas trees [lights];Outdoor electrical lighting fixtures;Outdoor lighting;Outdoor lighting fittings;Outdoor showers for bathing;Oven fittings made of fireclay;Oven gas igniters;Oven ventilator hoods;Ovens;Ovens for the treatment of waste;Ovens for use in the electronics industry;Ovens (Microwave -) for industrial purposes;Ovens, other than for laboratory use;Ovens (Shaped fittings for -);Ovens utilising air frequency fields for cooking;Ovens utilising air frequency fields for drying purposes;Overhead lamps;Overhead showers;Overlying bed ovens for bakeries;Oxyhydrogen burners.
