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