id	keyword
ap-6795	heat
ap-6795	kiln
ap-6795	mass
ap-6795	cyclone
ap-6795	flow
ap-6795	clinker
ap-6795	feed
ap-6795	kiln feed
ap-6795	gas
ap-6795	cement
ap-6795	plant
ap-6795	heat flow
ap-6795	conservation
ap-6795	cooler
ap-6795	process
ap-6795	air
ap-6795	temperature
ap-6795	heat conservation