A system 10 wherein {HEAD ~ the toothed platen} for the forcer is {TAIL ~ a toothed platen} for the magnetic structure, there being no independent toothed platen or scale for the magnetic structure 
is
A system 10 wherein { HEAD ~ the toothed platen } for the forcer is { TAIL ~ a toothed platen } for the magnetic structure , there being no independent toothed platen or scale for the magnetic structure
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH