{HEAD ~ The aerosol container} has {TAIL ~ an aerosol valve} from which the contents exit the container 
has
{ HEAD ~ The aerosol container } has { TAIL ~ an aerosol valve } from which the contents exit the container
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH