{HEAD ~ The floor care apparatus} 12, wherein {TAIL ~ the pressure sensors} sense one of air pressure and force pressure 
wherein
{ HEAD ~ The floor care apparatus } 12 , wherein { TAIL ~ the pressure sensors } sense one of air pressure and force pressure
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH