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