Simultaneously, {HEAD ~ a switching circuit} electrically connects {TAIL ~ the Vcc lines} across the transducer positioning voice coil motor in the disc drive, thereby delivering current from the spindle motor to the voice coil 
electrically connects
Simultaneously , { HEAD ~ a switching circuit } electrically connects { TAIL ~ the Vcc lines } across the transducer positioning voice coil motor in the disc drive , thereby delivering current from the spindle motor to the voice coil
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH