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