{HEAD ~ Liquid} is introduced into {TAIL ~ the bladder} via a valve which fits through the side wall of the cylinder  
{ HEAD ~ Liquid } is introduced into { TAIL ~ the bladder } via a valve which fits through the side wall of the cylinder
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 OTH