DIFF Subgroup
F27B 9/3005 Full Title
Furnaces through which the charge is moved mechanically, e.g. of tunnel type (rotary-drum furnaces with means for agitating or moving the charge F27B7/14); Similar furnaces in which the charge moves by gravity > Details, accessories or equipment specially adapted for furnaces of these types
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Note: 3 CPC extensions are marked as secondary classification only.