The spacer means is secured to the lamp member and is in {HEAD ~ operative contact} with {TAIL ~ the cover} 
with
The spacer means is secured to the lamp member and is in { HEAD ~ operative contact } with { TAIL ~ the cover }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL