{TAIL ~ said main portion} and tubular portion having {HEAD ~ an inner surface} and a generally arcuate shaped outer surface 
{ TAIL ~ said main portion } and tubular portion having { HEAD ~ an inner surface } and a generally arcuate shaped outer surface
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH