This cast alloy article is chiefly characterized by having coarse and irregular surface contour of interspersed peaks, {HEAD ~ valleys} and pores that provide for increased surface area for increased fluid contact and provide for increased turbulence in {TAIL ~ fluid flow} 
This cast alloy article is chiefly characterized by having coarse and irregular surface contour of interspersed peaks , { HEAD ~ valleys } and pores that provide for increased surface area for increased fluid contact and provide for increased turbulence in { TAIL ~ fluid flow }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL