As best shown in FIGS 4 and 5, the interior 22 of system housing 11 contains a compressor 23, a controller 24, a position sensor 25 and {HEAD ~ batteries} 26 and 27 to supply {TAIL ~ electrical power} to the compressor 23 
As best shown in FIGS 4 and 5 , the interior 22 of system housing 11 contains a compressor 23 , a controller 24 , a position sensor 25 and { HEAD ~ batteries } 26 and 27 to supply { TAIL ~ electrical power } to the compressor 23
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH