F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F27
FURNACES; KILNS; OVENS; RETORTS
F27
FURNACES; KILNS; OVENS; RETORTS
F27B
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
F27B
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
F27B5/00
Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
F27B5/00
Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated