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