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