{HEAD ~ An actuator} engages {TAIL ~ the shaft} for translation from a first retracted position to a second extended position 
engages
{ HEAD ~ An actuator } engages { TAIL ~ the shaft } for translation from a first retracted position to a second extended position
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH