The ability of {HEAD ~ the user} of {TAIL ~ the scrubber} to change scrubber sections to fit the requirements of the material being treated greatly adds to the efficiency of the overall device 
of
The ability of { HEAD ~ the user } of { TAIL ~ the scrubber } to change scrubber sections to fit the requirements of the material being treated greatly adds to the efficiency of the overall device
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH