{HEAD ~ The horizontal lands} and {TAIL ~ horizontal ribs} can extend continuously in a vertical direction from the shoulder region to the base portion 
{ HEAD ~ The horizontal lands } and { TAIL ~ horizontal ribs } can extend continuously in a vertical direction from the shoulder region to the base portion
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH