deploying the first member of the first pair and {HEAD ~ the second member} of the second pair into contact against {TAIL ~ an inner wall} of the first vessel such that the first vessel and second vessel are in fluid communication with one another 
deploying the first member of the first pair and { HEAD ~ the second member } of the second pair into contact against { TAIL ~ an inner wall } of the first vessel such that the first vessel and second vessel are in fluid communication with one another
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH