DIFF Subgroup
F27B 7/166 Full Title
Rotary-drum furnaces, i.e. horizontal or slightly inclined > with means for agitating or moving the charge > the means being fixed relatively to the drum, (F27B7/04 takes precedence)
F27B 7/166 Rotary-drum furnaces, i.e. horizontal or slightly inclined > with means for agitating or moving the charge > the means being fixed relatively to the drum, (F27B7/04 takes precedence)