DIFF Subgroup
F23D 14/148 Full Title
Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid > Radiant burners > using screens or perforated plates
F23D 14/148 Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid > Radiant burners > using screens or perforated plates