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