{TAIL ~ A smoothly arched notch} extends axially to the topmost edge of {HEAD ~ the box end} 
{ TAIL ~ A smoothly arched notch } extends axially to the topmost edge of { HEAD ~ the box end }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD