Once the pole pieces are magnetized, no further energy must be applied to {TAIL ~ the magnet} to operate {HEAD ~ the separation system} 
Once the pole pieces are magnetized , no further energy must be applied to { TAIL ~ the magnet } to operate { HEAD ~ the separation system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD