In {HEAD ~ a preferred embodiment}, {TAIL ~ the outlet} has a width equal to the width of one of the zones 
In { HEAD ~ a preferred embodiment } , { TAIL ~ the outlet } has a width equal to the width of one of the zones
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH