The relative locations of the cylinder and {TAIL ~ piston} are controlled by {HEAD ~ a liquid filled bladder} which is located inside the cylinder  
The relative locations of the cylinder and { TAIL ~ piston } are controlled by { HEAD ~ a liquid filled bladder } which is located inside the cylinder
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH