The angle β, which extends between the tangent of {TAIL ~ the breakaway edge A} and {HEAD ~ the perpendicular} to the outlet plane of the tube 20, is the same size as angle β 
The angle β , which extends between the tangent of { TAIL ~ the breakaway edge A } and { HEAD ~ the perpendicular } to the outlet plane of the tube 20 , is the same size as angle β
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH