A pipeline for conducting air for air conditioning in aircrafts includes {HEAD ~ a body portion} formed with {TAIL ~ foamed plastics material} or with a dense plastics material 
formed with
A pipeline for conducting air for air conditioning in aircrafts includes { HEAD ~ a body portion } formed with { TAIL ~ foamed plastics material } or with a dense plastics material
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH