The kiln is provided with {HEAD ~ a compartment} for introducing {TAIL ~ a reducing agent} into the chamber 
for introducing
The kiln is provided with { HEAD ~ a compartment } for introducing { TAIL ~ a reducing agent } into the chamber
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH