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