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