{TAIL ~ A vehicle tracking system} includes a wheel unit containing {HEAD ~ circuitry} capable of sensing various types of conditions, such as specific electromagnetic and magnetic signals indicative of particular wheel locations 
{ TAIL ~ A vehicle tracking system } includes a wheel unit containing { HEAD ~ circuitry } capable of sensing various types of conditions , such as specific electromagnetic and magnetic signals indicative of particular wheel locations
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH