id	keyword
alkej-13	system
alkej-13	failure
alkej-13	input
alkej-13	control
alkej-13	fault
alkej-13	event
alkej-13	power
alkej-13	system failure
alkej-13	engineering
alkej-13	fig
alkej-13	unit
alkej-13	tree
alkej-13	khwarizmi
alkej-13	journal
alkej-13	vol.1
alkej-13	khafaji
alkej-13	/al