However, in variations of the tip distal end surface 34, the annular surface may be positioned at {HEAD ~ an angle} to the normal plane ranging between 30° and {TAIL ~ 5°} 
ranging between
However , in variations of the tip distal end surface 34 , the annular surface may be positioned at { HEAD ~ an angle } to the normal plane ranging between 30 ° and { TAIL ~ 5 ° }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL