This method is already practised by this inventor as {HEAD ~ a simple and effective method} in {TAIL ~ a design} of the magnetic device 
in
This method is already practised by this inventor as { HEAD ~ a simple and effective method } in { TAIL ~ a design } of the magnetic device
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH