{TAIL ~ The containers} 12 and beams 14 may be made from {HEAD ~ a variety} of materials, including metals, composite material, ceramics and plastics, but are preferably rigid and light weight 
{ TAIL ~ The containers } 12 and beams 14 may be made from { HEAD ~ a variety } of materials , including metals , composite material , ceramics and plastics , but are preferably rigid and light weight
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH