Most prior art refers to electrolysis of the slip liquid as the primary cause of {HEAD ~ porosity} in {TAIL ~ castings} 
in
Most prior art refers to electrolysis of the slip liquid as the primary cause of { HEAD ~ porosity } in { TAIL ~ castings }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL