The hand held device has a motor powered by water supplied under pressure, which motor operates a rotary brush lubricated by {HEAD ~ water} flowing through {TAIL ~ the motor} 
flowing through
The hand held device has a motor powered by water supplied under pressure , which motor operates a rotary brush lubricated by { HEAD ~ water } flowing through { TAIL ~ the motor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL