Because {HEAD ~ stainless steel} is {TAIL ~ the material} typically used for the boat for PSG deposition, the linear coefficient of thermal expansion of the boat is significantly greater than that of PSG 
is
Because { HEAD ~ stainless steel } is { TAIL ~ the material } typically used for the boat for PSG deposition , the linear coefficient of thermal expansion of the boat is significantly greater than that of PSG
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH