The brush members extend through the slot with {HEAD ~ a first end} of the brush arranged in {TAIL ~ the tube} and a second end contacting the workpiece 
arranged in
The brush members extend through the slot with { HEAD ~ a first end } of the brush arranged in { TAIL ~ the tube } and a second end contacting the workpiece
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH