In one example, each steel pipe has a 12 inch inside diameter and a length of 40 feet , with {HEAD ~ the pipes} being connected in {TAIL ~ series} 
connected in
In one example , each steel pipe has a 12 inch inside diameter and a length of 40 feet , with { HEAD ~ the pipes } being connected in { TAIL ~ series }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL