a conduit means for acquiring {HEAD ~ gas} from the gas line into {TAIL ~ said flexible bladder} 
into
a conduit means for acquiring { HEAD ~ gas } from the gas line into { TAIL ~ said flexible bladder }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL