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