This radius R runs up to {HEAD ~ the outlet plane} of {TAIL ~ the tube} 20, the angle β between the start and end of the curvature being 3 mm 
of
This radius R runs up to { HEAD ~ the outlet plane } of { TAIL ~ the tube } 20 , the angle β between the start and end of the curvature being 3 mm
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH