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