{TAIL ~ An inert gas}, such as {HEAD ~ N2} is then blown over the coated substrate 
{ TAIL ~ An inert gas } , such as { HEAD ~ N2 } is then blown over the coated substrate
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH