Streamlining {TAIL ~ the profile} of the transition section of the plastic tube, which already has ultra smooth surface characteristics, provides {HEAD ~ a flow passage} that substantially eliminates areas of potential turbulence 
Streamlining { TAIL ~ the profile } of the transition section of the plastic tube , which already has ultra smooth surface characteristics , provides { HEAD ~ a flow passage } that substantially eliminates areas of potential turbulence
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH