A substrate is provided within a reaction chamber, and {HEAD ~ a mixture} is also provided within {TAIL ~ the chamber} 
is provided within
A substrate is provided within a reaction chamber , and { HEAD ~ a mixture } is also provided within { TAIL ~ the chamber }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL