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