{HEAD ~ The column} 7 and the entire apparatus may be wrapped in {TAIL ~ a thermally controlled housing} 11 as represented in herringbone patterned fill in 
{ HEAD ~ The column } 7 and the entire apparatus may be wrapped in { TAIL ~ a thermally controlled housing } 11 as represented in herringbone patterned fill in
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH