A reservoir 40 is arranged in the chamber 47 and {HEAD ~ a reservoir} 41 is arranged in {TAIL ~ the chamber} 38 
A reservoir 40 is arranged in the chamber 47 and { HEAD ~ a reservoir } 41 is arranged in { TAIL ~ the chamber } 38
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH