{TAIL ~ A micro element} 25, comprising the angle being between 120° and {HEAD ~ 130°} 
{ TAIL ~ A micro element } 25 , comprising the angle being between 120 ° and { HEAD ~ 130 ° }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD