{HEAD ~ The orientation} of these gaps in the back iron are configured to achieve {TAIL ~ the desired operation} of the design 
are configured to achieve
{ HEAD ~ The orientation } of these gaps in the back iron are configured to achieve { TAIL ~ the desired operation } of the design
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH