{HEAD ~ a substrate} disposed inside {TAIL ~ a housing}, the substrate including a substrate surface occupying the most surface area of any surface of the substrate 
{ HEAD ~ a substrate } disposed inside { TAIL ~ a housing } , the substrate including a substrate surface occupying the most surface area of any surface of the substrate
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH