The invention also has as its object to provide {HEAD ~ a cheap and operationally reliable apparatus} for performing {TAIL ~ the process} which operates without pollution 
for performing
The invention also has as its object to provide { HEAD ~ a cheap and operationally reliable apparatus } for performing { TAIL ~ the process } which operates without pollution
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH