The system also includes {TAIL ~ a voltage source} providing {HEAD ~ a direct current level voltage} with respect to an electric ground and a switching circuit adapted to operate the motor 
The system also includes { TAIL ~ a voltage source } providing { HEAD ~ a direct current level voltage } with respect to an electric ground and a switching circuit adapted to operate the motor
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH