{HEAD ~ The actuator} is divided into {TAIL ~ two cells} by a power transfer shaft to which is attached a vent follower 
is divided into
{ HEAD ~ The actuator } is divided into { TAIL ~ two cells } by a power transfer shaft to which is attached a vent follower
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH