{HEAD ~ The covering means} may comprise {TAIL ~ one or more glazing plates}, or they may also be in the form of one or more glazing domes 
comprise
{ HEAD ~ The covering means } may comprise { TAIL ~ one or more glazing plates } , or they may also be in the form of one or more glazing domes
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH