CPC Subgroup
F23K 5/20 Preheating devices (in burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space F23D11/44)
Full Title
Feeding or distributing other fuel to combustion apparatus > Liquid fuel > Details thereof > Preheating devices (in burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space F23D11/44)