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Lufterhitzer m -s, =
gen.	air heater; fan heater; air reheaters
agric.	heater; radiator
agric., mech.eng.	hot air heater
construct.	air-heating plant; air-heating unit; calorifier; heating coil
el.	air preheater
energ.ind.	furnace; warm-air furnace
environ.	air heating apparatus
mun.plan.	fan convector; unit heater

Lufterhitzer: 7 phrases in 5 subjects

Chemistry	1
Construction	2
Energy industry	2
Municipal planning	1
Technology	1