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