id	keyword
alkej-320	� �
alkej-320	chimney
alkej-320	collector
alkej-320	ا �
alkej-320	area
alkej-320	reduction
alkej-320	flow
alkej-320	air
alkej-320	velocity
alkej-320	h �
alkej-320	temperature
alkej-320	power
alkej-320	model