{TAIL ~ A distraction screw} is mounted through the cylinder and with one end resting on {HEAD ~ the chamber} 
{ TAIL ~ A distraction screw } is mounted through the cylinder and with one end resting on { HEAD ~ the chamber }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD