{HEAD ~ The pressure} of {TAIL ~ the tube} is maintained at 175 to 200 millitorr while the reactant gases are flowed in 
of
{ HEAD ~ The pressure } of { TAIL ~ the tube } is maintained at 175 to 200 millitorr while the reactant gases are flowed in
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