DIFF Subgroup
F27B 17/0008 Full Title
Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00 (structural combinations of furnaces F27B19/02)
F27B 17/0008 Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00 (structural combinations of furnaces F27B19/02)