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