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