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