CPC Subgroup
C21B 5/06 using top gas in the blast furnace process (in coke ovens C10B)
Full Title
Making pig-iron in the blast furnace > using top gas in the blast furnace process (in coke ovens C10B)
C21B 5/06 Making pig-iron in the blast furnace > using top gas in the blast furnace process (in coke ovens C10B)