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