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