{HEAD ~ Each} of {TAIL ~ the guide rails} comprises an end proximate to the aerosol valve and an end distal from the aerosol valve 
of
{ HEAD ~ Each } of { TAIL ~ the guide rails } comprises an end proximate to the aerosol valve and an end distal from the aerosol valve
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH