A conduit is provided between the cannisters, and {HEAD ~ a quantity} of volatile fluid is located in the cannisters and {TAIL ~ conduit} 
is located in
A conduit is provided between the cannisters , and { HEAD ~ a quantity } of volatile fluid is located in the cannisters and { TAIL ~ conduit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL