id	keyword
brj-24417	flame
brj-24417	fire
brj-24417	test
brj-24417	retardant
brj-24417	wood
brj-24417	rml
brj-24417	board
brj-24417	doi
brj-24417	jang
brj-24417	article
brj-24417	materials
brj-24417	building
brj-24417	heat