Predetermined torque must be applied to {TAIL ~ load} to rotate the motor at {HEAD ~ low speed} 
Predetermined torque must be applied to { TAIL ~ load } to rotate the motor at { HEAD ~ low speed }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD