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